Blog
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The Pitch
October 09, 2026
No, this is not an elevator pitch for anything, quite the opposite. I just made an app, and it's called Pitcher! And by that, I don't mean I really wrote any code, it's all written by deepseek and...
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Reverse Interview Questions
October 07, 2026
A while ago I wrote about my values at work, and that if I had a choice, what would I choose. It is not often that I have that choice, but it is good to aim idealistic and expect realistic. So, in...
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BBQ Sauce, or How to Design Survey Questions
October 07, 2026
When I moved to the US, I tried BBQ sauce and decided I didn't like it. Too sweet. Later I learned there are two families: sugar-based and vinegar-based. The vinegar kind, I loved.
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جهان امید
October 02, 2026
با صدای احسان طبری (شاعر)
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In search of lossless encoding
September 15, 2026
When gpt3 came out, I half-jokingly wrote:
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What Do We Value When We Value Consistency?
August 20, 2026
I'm often interested in understanding why people believe the things they believe and why they behave the way they behave. Usually the former is a reason for the latter. Pondering these, I've realized...
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What is mathematics
August 06, 2026
Last night Ehssan sent me a post from a math professor that has been making the rounds. The professor loves research and hates grading. Who doesn't? But lately, he wrote, his research has started to...
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Solopreneurship for beginners
August 04, 2026
I sat through a talk by Clair Sullivan about making a tech career layoff-proof by going solopreneur. I am still deciding how much of it I actually believe. This is my notes from that talk.
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What I want to become when I grow up?
July 27, 2026
Every once in a while I have to revisit this question and this time I took a bit longer to answer it, trying to inform it based on multiple blog posts by Chip Huyen and Eugene Yan. As Maleknaz says I...
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Empathy vs. sympathy vs. compassion: feature matrix
July 16, 2026
✓ = present / defining = partial / possible = absent / not required
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The i16n - AKA Intershitilization
July 08, 2026
It has become very common for companies, entities, institutes and so on to signal that they care about other cultures and languages. For most of them it simply means more customers, more business,...
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Marginalia
May 08, 2026
I keep finishing books and forgetting the things they teach. I've had the same issue with math and had looooooooooong discussions with Ehssan about what does it even mean to "learn"/"know" something?...
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And No One Knows I'm Gone
April 12, 2026
Hamid said something that stuck with me: how come nobody, and I mean absolutely nobody, has my point of view? Why does no one say the things that are in my head, while when I'm talking to you guys...
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The Elevator
April 08, 2026
There are a few people in my life (mostly in the role of an advisor/mentor) that have given me a feeling that I haven't experienced anywhere else. These are people who are well accomplished and well...
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Don't read the news
March 29, 2026
I don't normally read the news. But with the current situation in Iran I've been reading a lot more. Something like 7-8 hours on some days. Reading that much bad news with that high of an impact...
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The Trap Is Being Built Right Now
March 29, 2026
Iran has had no internet for four weeks. Not slow, not restricted. Gone. The only app that works is Bale, made by the Iranian government. Everyone knows what it is. Everyone knows what it's for....
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Manufacturing Taste
March 26, 2026
I asked Hadi, half-jokingly, whether Bach was the Justin Bieber of his time. Are we just listening to the most "popular" artists of the 1700s and calling it high culture? And the flip side: will...
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آیا بیپیآ مضر است؟
February 23, 2026
بیپیآ (بیسفنول آ) و بیپیاس (بیسفنول اس) موادی شیمیایی هستند که در پلاستیکها، پوشش قوطیها، و کاغذهای حرارتی رسید استفاده میشوند. این مواد اختلالگر هورمونی هستند که میتوانند استروژن را تقلید...
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Is BPA Bad?
February 23, 2026
BPA (Bisphenol A) and BPS (Bisphenol S) are chemicals in plastics, can linings, and thermal receipt paper. They are endocrine disruptors: they can mimic estrogen and interfere with the body's...
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Let's Talk Privacy
February 01, 2026
When a company talks about "end-to-end encryption" (E2EE) they could mean several things in practical terms. The fact that data is encrypted "on sender's device" and then decrypted "on receiver's...
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Should vs. Does
January 22, 2026
You're at the lake with your 3-year-old. You want to fish. He wants to play with you. You brought toys, snacks, a little chair for him. He should be able to entertain himself for a bit. You set him...
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The Case for Complete Government Transparency
January 22, 2026
Imagine you own a company. One day, you ask a senior manager how they decided to spend a million dollars of the company's budget. They look you in the eye and say: "I'm not going to tell you. If you...
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I Want Good Movies
January 20, 2026
Hossein used to be my source of good movies. He knew my taste, he had his own taste, but also he used to watch a shit ton of movies, good and bad, and then he'd know what they're about and could...
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Can't Stop, Addicted To The Shindig
December 01, 2025
I recently got introduced to this game called Can't Stop and it got me thinking about probabilities. You know how it is - you start playing a dice game and suddenly you're knee-deep in combinatorics...
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16-Week Olympic Triathlon Training Plan
November 12, 2025
I put together an interactive training plan for an Olympic-distance triathlon (1500m swim, 40km bike, 10km run). It's a 16-week progressive plan with 6 workouts per week (2 swims, 2 bikes, 2 runs)...
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The Measurement Trap and the Path to Intentionalism
October 23, 2025
I've been writing a series of thoughts recently in order to clarify a point of view of mine. These are the original posts:
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On Intentionalism
October 18, 2025
There's a mathematical insight that explains why some people consistently end up with better outcomes than others, and it has nothing to do with talent, luck, or even the quality of their choices.
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Idiocratic Much?
September 15, 2025
After writing about how companies get distracted by competitive dynamics, I got some great feedback that helped me work through some deeper thoughts.
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Foundation Or Competition, That Is The Question
September 13, 2025
There's this pattern that keeps showing up in tech and beyond: companies get so caught up in matching what their competitors are doing that they lose sight of actually solving the underlying problem....
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We Must Know, We Will Know
September 02, 2025
There are people who view everyone around them through a single lens of accomplishment. In professional circles, it's salary or publication count. In religious communities, it might be how many...
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Instruction Manual
June 17, 2025
- on a bad day, get up and read the instruction manual, the section on bad days. - on a bad day, set the alarm for 6:30am, but don't worry if you don't feel like getting out of the bed then, stay as...
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کارما
April 11, 2025
یکی از جذابیتهای زندگی برام پیدا کردن بازخوانیهای آهنگهاست، هرچند برنامهای براش ندارم، ولی هروقت که یکی به گوشم میخوره جذب میشم برم بیشتر گوش بدم و بخونم و ببینم جریان چی بوده و اینکه آهنگ چقدر...
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"Not Even Wrong": What We Believe And Why
March 12, 2025
In a world flooded with information and competing claims, we like to think we evaluate ideas based on evidence and reasoned analysis. But beneath our conscious reasoning lie powerful psychological...
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توضیح واضحات
February 04, 2025
در ادامه مبحث خیانتهایی که زبان و ادبیات فارسی به تفکر جمعیمون کرده (و اینکه ادبیاتمون تصویری از طرز فکرمونه) این رو بگم که یه ضربالمثل داریم که: «دیگ به دیگ میگه روت سیاه». ینی اگه خودت یه...
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House Hunting Shenanigans
February 03, 2025
So, I've been looking for a house for almost a year now. It's been way longer than I expected and the market has been weird, to say the least. But just for the context, there are a lot of houses that...
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Looking for a monitor
January 20, 2025
I've had two monitors on my desk for my work for the past few years which I combine with my laptop for a 3-screen workstation. It works fine, except one of the monitors has started flickering for a...
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Memoir of a Snail
January 20, 2025
The other day Marjan recommended the movie Memoir of a Snail and as I was going to find an watch it, the website recommended another movie called Diary of a Nymphomaniac. Everything about it seemed...
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Ask Culture vs. Guess Culture
January 20, 2025
Someone was talking about this that these came up: - The Culture Map - Navigating ‘Ask’ and ‘Guess’ Cultures in a modern world
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In Search for a quite table saw
January 11, 2025
So I've been looking for a house for quite a while now, and one of the minimum requirements that I have for it is the ability to do as much woodworking as I want, and an added plus if I can do it...
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Nautilus has become such a disaster
January 11, 2025
And that's partly because Ubuntu has become such a disaster. If only I could find reliable drivers for my GPU on any other linux distribution, I'd never go back to it.
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Discovering Perspectives Through Colorblindness
December 11, 2024
One of the most enlightening conversations I've had recently started with my friend sharing how his colorblindness influenced his life choices—even leading him away from a potential career as a...
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Finding a phone
December 07, 2024
For years, I’ve been particular about the cellphones I use. It’s not just about having a phone—it’s about finding one that genuinely solves my problems without forcing me into unnecessary ecosystems...
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نمیدونم گنجشکها باهوشتر شدن، یا پنجرهها رو بهتر میسازن
November 07, 2024
نمیدونم گنجشکها باهوشتر شدن، یا پنجرهها رو بهتر میسازن، یا صرفا از روی شانسه، ولی بچه که بودم هر از گاهی یه گنجشک از در یا پنجره بازی وارد خونه میشد و یهو متوجه میشد وارد جای اشتباهی شده. بعد چون...
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پرده بگردان و بزن ساز نو
October 20, 2024
پرده بگردان و بزن ساز نو
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ادبیات فارسی خیلی غنیه اما مزخرفات هم بیاندازه داره
October 07, 2024
ادبیات فارسی خیلی غنیه اما مزخرفات هم بیاندازه داره. به هر حال هیچ چیزی نمیتونه هزاران سال دوام بیاره و فقط چیزای خوب توش باشه. یه سری از مزخرفاتش به فرهنگ رضایت یا همون consent برمیگرده. بخشی از...
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خاله خرسهای که لالایی بلده
September 30, 2024
خاله خرسهای که لالایی بلده ها... نصف لالاییهای مادربزرگ رو حفظه و برای همه دوستاش که میخوان زیر درخت یه چرتی بزنن میخونه و سریع خوابشون میبره. همه بجز خودش که تا پشهها رو میبینه مگسی میشه و سنگه...
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امروز ۱۵ ساله شدم
August 21, 2024
امروز ۱۵ ساله شدم. ۱۵ روز از آخرین روزی که پام تو زادگاهم بود میگذره. از آغاز سفری که به قصد رسیدن به زندگی بهتر بوده. احتمالا باید ۱۵ سالگی رو جشن گرفت، اما حس تولد نداشتم، بیشتر حس از دست دادگی،...
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اگه تو یه روز آفتابی دراز کشیده باشی
July 29, 2024
اگه تو یه روز آفتابی دراز کشیده باشی تو یه ساحل شنی جایی که موج میخوره بهت، یه جایی هست که آب میاد میخوره بهت، خاک و جونورهای ریز میریزه روت و میشوره و میبردشون. اما همیشه یه کمی خاک و جونور میمونن....
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آیا انجام دادن «هر کاری» بهتر از هیچ کاری نکردن هست؟
July 29, 2024
آیا انجام دادن «هر کاری» بهتر از هیچ کاری نکردن هست؟ هرچه بیشتر به این موضوع فکر میکنم به این نتیجه میرسم که به تعریف ما از «هیچ کاری نکردن» برمیگرده. ولی چیز غیر قابل تعریفی نیست. هیچ کاری رو میشه...
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یه سری آدما فکر میکنن فقط خانما پریود میشن
July 22, 2024
یه سری آدما فکر میکنن فقط خانما پریود میشن. خانما احتمالا بهشون بر میخوره که ینی چی که هرچیزی رو از ما مصادره میکنین به نفع خودتون. آقایون هم احتمالا فکر میکنن سبیلشون کلفتتر از این حرفاست که بشه...
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با دوستان تصمیم گرفته بودیم که بریم یه راهپیماییای بکنیم
July 13, 2024
با دوستان تصمیم گرفته بودیم که بریم یه راهپیماییای بکنیم. یکی از دوستان یه مسیر رفت و برگشت ۲۶ کیلومتری کنار اقیانوس رو پیشنهاد داد که من گفتم چون بدنم آماده نیست نمیتونم برم. پیشنهاد دادم که دو...
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تو لنگفورد به بُتهجِقه میگن خیارشور ایرانی
June 18, 2024
تو لنگفورد به بُتهجِقه میگن خیارشور ایرانی. تو لنگرود نشان یه سرو خمیده از فروتنیه.
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دستم رو گرفته و به زور میکشدم
May 05, 2024
دستم رو گرفته و به زور میکشدم که ببره سمت زورخونه. میگم: لوتی ما خودمون پا گود بزرگ شدیم. اصرار میکنه که: بیا میخوام یه چیزی نشونت بدم. با اکراه دنبالش راه میفتم. از کوچههای بازار رد میشیم و از دو...
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گر صبر کنی...
April 19, 2024
- اواسط سال ۲۰۱۸ یه تعداد از ایرانیها (حدود ۱۳۰ نفر) از چهار تا از ارگانهای دولت کانادا (وزارت مهاجرت و شهروندی، وزارت امنیت عمومی، سازمان امور مرزداری، و سازمان امور اطلاعات امنیت) به کمسیون حقوق...
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اول سر صبی دارم کرکره رو میدم بالا
April 05, 2024
اول سر صبی دارم کرکره رو میدم بالا که اومده قلکش رو زده کف زمین و سکههاش رو نشونم میده که امروز دیگه میرم میخرمش. نگاهی بهش میکنم و سرد و خشک و کوتاه بهش میگم: پولت نمیرسه. با یه ژست متمدنانه و لحن...
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ریچارد گای یکی از ریاضیدانهای معروف دنیا بود
March 30, 2024
ریچارد گای یکی از ریاضیدانهای معروف دنیا بود که چند سال پیش در سن ۱۰۳ سالگی از دنیا رفت و تا آخرین روزهای عمرش مرتب به دفترش میرفت و تا جایی که میتونست سعی میکرد از مغزش استفاده کنه. چند سال پیشتر...
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سال ۷۳، یه شب تابستونی، لنگرود...
March 08, 2024
سال ۷۳، یه شب تابستونی، لنگرود و خونهای که توش به دنیا اومدم، اتاق پذیرایی که معمولا درش بستهست و زمستونها سردتر از بقیه اتاقهاست و تابستونها فرقی نمیکنه، چون هنوز کولرهای گازی رایج نشدن. پردههای...
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Which province in Canada pays the least tax?
December 20, 2023
Well, that depends on how much income you have. Here is a chart of the 2023 tax brackets in 8 of the provinces (I was just too lazy to get them all!) source:...
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بعضی آهنگها بلااستثنا من رو میبرن به دوران بچگی
December 18, 2023
بعضی آهنگها بلااستثنا من رو میبرن به دوران بچگی و در صدرشون آلبوم یاد ایام هست. تو ماشین نشستیم، از لنگرود میریم به سمت رودسر، بابام میرونه، مامان جلو نشسته و ما سه تا پشت. پاییزه و مثل همیشه بارون...
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«مگه خودت خواهر و مادر نداری؟»
June 12, 2023
«مگه خودت خواهر و مادر نداری؟»
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If Immigration Was A Baby
April 14, 2023
I left Iran to pursue the American dream. Not really, I just wanted to study and hopefully get a decent job. Soon after my arrival, I faced the harsh reality that life is not what is shown in the...
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مشکلات جهان اولی
January 11, 2023
تو لنگفورد یه همسایه دارم رزمنده جنگ بوده. رزمندههای اینجا تا اونجایی که من خبر دارم دو دستهن، اونایی که یه پول کلفتی نصیبشون شده و حسابی خوش میگذرونن و کار نمیکنن و خیلی هم ادعاشون میشه و طلبکارن،...
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So you want to animate your PDF files?
December 12, 2022
Here are some quick and dirty steps to include an animation in a pdf file. Note that not all pdf readers will support rendering the animation and many of them will show just a static image (likely...
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گوشم فرودگاه صداهای بیصداست*
August 13, 2022
گوشم فرودگاه صداهای بیصداست
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در لنگرود و لنگفورد هر سال
February 28, 2022
در لنگرود و لنگفورد هر سال به طور متوسط ۱۳۰ روز بارون میاد!
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مرثیهای برای همه
February 25, 2022
(اخطار: از آدمهایی که روضه خوب میخونن دوری کنین، حتی اگه روضه برای شماست)
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مسیر لنگرود-لنگفورد از لارامی میگذرد.
February 19, 2022
مسیر لنگرود-لنگفورد از لارامی میگذرد.
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یکی از مهمترین شباهتهایی که مردم لنگرود و لنگفورد دارن
February 11, 2022
یکی از مهمترین شباهتهایی که مردم لنگرود و لنگفورد دارن طرز رانندگی کردنشونه.
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One-parameter family of functions
October 01, 2021
Here's a fun paper to read: Real numbers, data science and chaos: How to fit any dataset with a single parameter. The premise of the paper is that "all the samples of any arbitrary data set can be...
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Remap keys on keyboard
August 08, 2021
On my keyboard I have two annoying keys right next to the arrow keys that go to previous/next page and I've always used them accidentally and have lost my drafts. Here is how I'm going to remap them...
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How far is far enough?
August 06, 2021
A frequentist vs Bayesian case
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3rd-grade math just got harder
April 28, 2021
James Tanton is full of seemingly innocent and amusing questions. One of the questions that kept me busy one night is this one:
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Getting (Non)philosophical With Bayes
March 29, 2021
Since first time I that have encountered a statistical "paradox" I have this feeling that my explanations for what is the "right" answer might not be correct and it might be the case that I'm just...
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Mutually informing the cause?
September 29, 2018
Disclaimer: I'm not a statistician, and no, correlation does not mean causation. Also, I'm not a seismologist. And none of the followings are necessarily true. I'm just stretching my thoughts here!
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Signless Laplacian and the matrix-tree theorem
September 27, 2018
What is the minimum number of links that you need to connect 4 computers in a wired network? 3.
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If you treat a network like a dynamical system...
September 21, 2018
Let's say we have a graph (i.e. network), and we want to cluster the vertices (nodes). Here, think of the nodes as people, agents, oscillators, some dynamic being, and the edges... the edges tell...
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Balls, bins, and the Hungarian method
August 30, 2018
It always excites me when I see a combinatorial matrix theory problem, and this is no exception, though it is so basic that it shows up in all forms and shapes. Let me start with a combinatorial...
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Delayed Iranian Applications Update - UCalgary HR and ISS
July 06, 2018
After meeting with Susan Parker, the vice provost of the student experience at the University of Calgary, and Brianna (Bree) Huene from International Student Services, the university announced a...
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A missed point
June 04, 2018
You call a company to book an appointment for their service,
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Filing a Human Rights Complaint with the CHRC
May 18, 2018
If you believe you have been discriminated against by a federal organization in Canada, you can file a complaint with the Canadian Human Rights Commission (CHRC). Here is a step-by-step guide to the...
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"How's everybody doing?"
February 11, 2018
One of the things I'm always told by my colleagues who visit my classes is that I'm dry, serious, and even scary, and that's not how they know me outside classroom. So, I've been working on different...
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Brain networks and the hiking trails
February 10, 2018
In the neuroscience community there's a divide on whether there are functional connectivity networks in the brain. This is a very vaguely defined concept, although, one can think of it this way:
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Playing catch with Poison
December 21, 2017
My friend asked me this: Put balls into $n$ buckets uniformly at random and count $h$ the number of buckets with at least one ball in them. What is the expected value of number of balls $k$?
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What do you do when you are a bullied academic?
December 19, 2017
This past summer I was given a course in introductory linear algebra to teach. The topics of the course, as usual, start from solving systems of linear equations, and then matrices, determinant and...
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Octave/MATLAB resources
December 16, 2017
Andrew Ng in his Corsera course for machine learning provides the following links for resources for Matlab. I have had a terrible time remembering all the syntaxes in matlab (because they are so...
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Why am I not attending JMM, but organizing a session?
December 05, 2017
For the past couple of years my colleagues and I organize a session at the JMM (Joint Mathematics Meeting). For the past couple of years that I've been in Canada I traveled back to US several times...
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On defending (human) rights and other issues
December 05, 2017
- I've moved to US from Iran several years ago. One of the topics that always intrigued me is the history of white vs. native people. At the beginning I was interested in learning more about history....
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Ulam spiral
November 11, 2017
So, bored in a math talk Ulam starts writing integers in a spiral and circling primes. He soon notices something weird:
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2017 Fields Medal Symposium in honour of Martin Hairer
October 23, 2017
I recently participated at the Fields Medal Symposium held at the Fields Institute in Toronto, in honour of Martin Hairer, one of the recipients of the medal in 2014. His work revolves around...
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Non-teaching aspects of teaching at University of Calgary
August 10, 2017
I've been a math postdoc at University of Calgary for two years now, and I'll be here for at least one more year. The teaching environment is very pleasant, and the resources are abundant....
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Listen to your pc music through your phone
August 10, 2017
So I have this bunch of music on my external hard drive that is connected to my PC at home and I need to get over there to play it while I'm at home, but that's usually a hassle, well, to some...
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Memorandum
July 26, 2017
این کوزهگر دهر چنین جام لطیف میسازد و باز بر زمین میزندش
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So you wanna move to Canada?
May 25, 2017
I've recently moved to Canada and applied for permanent residency through the Express Entry system. If your situation is similar to me (you have a higher education degree, a few years of part time --...
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Miroslav and the separating wand
April 08, 2017
In a huge graph, it is hard to determine a bottleneck by just looking at it, or doing any type of search. And by a bottleneck, I mean part of graph that is not very much connected to the other part....
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Two New Movies
April 06, 2017
I recently went to a couple of screening which made me really happy.
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Nonsymmetric SIEP paper is published in LAA
April 05, 2017
My first solo paper "Existence of a Not Necessarily Symmetric Matrix with Given Distinct Eigenvalues and Graph" got published in Journal of Linear Algebra and its Applications, yesterday. It took it...
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Academic Cry Baby and the Wall
February 01, 2017
Yesterday I got several emails from various people at charge at the university stating that they are concerned about the people who are directly affected by the US ban on people from muslim-majority...
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Feedback - part I
January 27, 2017
Without much ado here is a book that is changing my life:
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Pidgin and batch rename in python
December 02, 2016
I remembered that I can use pidgin! I don't know what I haven't been using it for a while. But now that I've installed it again, I went and downloaded yahoo smilies (from here) and the according to...
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Determinant and Jacobian
October 07, 2016
Today I started my linear algebra class by motivating the determinant using a little bit of history and applications. In particular I talked about determinant appearing in the change of variables in...
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Teaching philosophies
October 05, 2016
One of the recent workshops I've attended here at the Taylor Institute was about developing a teaching philosophy offered by Carol Berenson.The goals of the workshop were
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Step-by-step reduction
September 20, 2016
One of the things that I always tell my students is to check their solutions when they are done solving a problem. That by itself can mean several things, depending on what the problems is. Of course...
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Generating not-so-much-random matrices
September 16, 2016
I've been using sage for a while now. I've also been teaching linear algebra for a few years. One of the problems in teaching linear algebra is coming up with a handful of examples of matrices that...
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Gershgorin Disks
September 15, 2016
Gershgorin circle theorem roughly states that the eigenvalues of an $n \times n$ matrix lie inside $n$ circles where $i$-th circle is centred at $A{i,i}$ and its radius is the sum of the absolute...
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Don't take IELTS
August 24, 2016
I recently took an IELTS exam at the University of Calgary branch. During the test dates several issues bothered me. The issues concerned the physical situation of the test room, unclear instructions...
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Linear approximation and Taylor polynomials
June 16, 2016
For a given function $f(x)$ around a point $a$, if you zoom in close enough on the graph of the function, you can't tell the difference between the curve and the tangent line to the graph of the...
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Merge PDF files
April 29, 2016
Try the good ghostscript:
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What to do with a long list?
April 22, 2016
I mean a list in SAGE. The answer is to
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Permanent rank paper is published by ELA
April 18, 2016
We started the project in Graduate Research Workshop in Combinatorics (Rocky Mountain Great Plains GRWC) in summer 2014, hosted by University of Denver and University of Colorado Denver. Two weeks of...
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A full matrix with given eigenvalues
April 18, 2016
In Theorem 3.1 of "The combinatorial inverse eigenvalue problems: complete graphs and small graphs with strict inequality, W. Barrett, A. Lazenby, N. Malloy, C. Nelson, W. Sexton, Electronic Journal...
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Losing the symmetry
April 08, 2016
If you know about my work, you know that for the past several years I've been working on a special type of problems called structured inverse eigenvalue problems (or SIEP's for short). Well, I mainly...
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On the last digits of conscutive prime numbers
March 23, 2016
If you have a prime number $p$ (other than two and five) then the last digit of $p$ is 1, 3, 7, or 9. If for some reason we believe that prime numbers are randomly distributed (after all, the last...
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Some March Mathness
March 03, 2016
I went to several talks and meetings in the past few days, and I am going to talk about some of them, but first let me start with some predicting game:
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Randomized algorithms in the kitchen
February 15, 2016
Officially, I first learned about randomized algorithms and derandomizing them in a course called Randomness in Computations, offered by John Hitchcock at University of Wyoming. It wasn't until then...
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Celebrating the joy of mathing with Arnold
February 08, 2016
I don't think anyone who's learned anything can deny the fact that they have learned from their errors. Well, they might not know this quite clearly but they would eventually agree that it is the...
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Teamerican
February 06, 2016
A long while is passed since the last time that I let the tea completely brew before I pour it and start drinking it while it is still close to 100°C. I did it today again. I was thinking about...
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Infinite inverse spectrum problems
February 06, 2016
Ehssan Khanmohammadi and I just submitted a paper on inverse eigenvalue problems for infinite graphs. Essentially we proved that for a given bounded set $\Lambda$ and an infinite graph $G$ on...
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Youtube
February 05, 2016
Let's say you want to watch a lecture on youtube and you need to also visit some of the links mentioned in the description or read some of the references, but you can't do them all online. Of course...
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Multiplication graph
February 03, 2016
I was watching this random video on youtube (which by the way is not the best video) that I thought maybe I can do the same thing. So, I started coding in Sage. Here is a what I want to do:
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Roots of a polynomial
January 28, 2016
Today I read a lot of random mathematics and many of them led to places outside math, and among them is this one: Parkinson's Law. One of them that at this last hour of work day is still related to...
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sftp stories
January 21, 2016
When I was at WIU I had this website on their server that I had to maintain through their sftp server. It's been a while I have forgotten how to connect to do it. So, I am rediscovering it step by...
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On mental health?
January 19, 2016
I've received an email a few days ago to review a paper: > [...] > We have received the following manuscript to be considered for publication in Mathematics (http://www.mdpi.com/journal/mathematics/)...
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Sagemath for calculus
December 01, 2015
I have used several geogebra applets in my calculus class, but there's always things that you wanna do that there's no applet out there for, or you can't modify them etc. So, I decided to write my...
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converting time to color
November 26, 2015
So, Danny pointed out this website and asked if one can write a script to do this on a computer. Here is what I came up with:
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Spotify on linux
October 29, 2015
Here I'm going to collect my attempts at installing and using spotify client on fedora 22.
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On convex bodies
October 17, 2015
Dmitry Ryabogin from Kent State University gave two talks today here at UCalgray. The first talk was about convex bodies with congruent projections. You can read about it here: PDF. And their recent...
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Making quick notes and searching through them
October 09, 2015
There are several times that I just want to jot down something and I don't have time to open a note, or I don't want it to get lost somewhere, or I don't want to decide where to save the file and...
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Search and play things from terminal
October 05, 2015
There are times that I feel lazy to open a new tab in my firefox to search for something or a youtube video, even though I have tags for every important thing that I use commonly. For example if my...
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Rotating X and disabling/enabling touch
September 20, 2015
- I use my tablet to write with its pen quite a lot, whether for taking notes, annotating a pdf file, or teaching. Here is a nice little script that I've made to get the screen to rotate and disable...
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Calibrating pen through xinput
September 16, 2015
So, this is too long, I'm gonna just make a new post for it. When I connect the tablet to a projector, due to change of resolution the pen is not calibrated any more. I've tried xinputcalibrator to...
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Things to do on a windows machine
September 13, 2015
And while I'm at it, let me get this post started. A lot of times it happens that I have to work on a windows machine for a period of time. While I'm still trying to figure out how to get rid of the...
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Things to do on a linux machine
September 13, 2015
There are several things that I need to do on a monthly or yearly basis on my laptop in order to fix some problems. So far, I googled the problem and tried the solutions one by one, until I reached...
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Strand Of Oaks
June 22, 2015
www.npr.org/event/music/415506185/strand-of-oaks-tiny-desk-concert
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My job
June 20, 2015
Last year was hard. I was looking for jobs and it was stressful. I finally got an offer from a computer gaming company. I think they mostly produce gambling games. The job is alright. The pay is not...
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هست شب، آری شب
April 14, 2015
حتما تو هم از این شبا داشتی که مشغول کارت هستی و یهو سرت رو میگیری بالا میبینی ساعت از ۱۲ گذشته. و نهتنها این باعث نمیشه که خوابت بگیره که خواب یکسره از سرت میپره. بهنظرم یکی از آزادیهایی که باید...
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بحث ثریا-وار درباره کنعان
April 07, 2015
یکی از چیزایی که تو ضربالمثلهامون معمولا در نظر گرفته نمیشه، یا حداقل ماهایی که ازشون استفاده میکنیم در نظر نمیگیریم قابلیت تعمیم دادنشونه. مثلا اینکه میگن خشت اول چون نهد معمار کج… میتونه تاکیدش...
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سرمایه ما هیچکسان عرض مثالیاست
March 22, 2015
همیشه برای خودم زندگی رو مثل رودخونهای تصور کردم که من در حال شنا کردن توش هستم، و زنده بودن، مرتبط بودن و خیلی چیزای دیگه به معنی ادامه دادن به شنا کردن بوده. خیلی وقتا با خودم فکر میکردم که خب چرا...
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Perturbation of multiple eigenvalues
March 15, 2015
For the past several months my Saturdays consist of two meetings, each of which about 4 hours long, with two of my colleagues working on various problems. Clearly we've hit a lot of dead ends, and...
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Motivation, choices, and persuation
February 21, 2015
So, here are a few things I tend to view from the perspective of my profession.
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Spectral characterization of matchings in graphs
December 19, 2014
We (Sudipta Mallik and I) just submitted our paper on the "Spectral characterization of matchings in graphs". It is based on our previous work on "Construction of real skew-symmetric matrices from...
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Shapism in Polygons
December 11, 2014
Visit http://ncase.me/polygons for an incredible presentation of mathematical sociology using simple fun games.
- lambda-tau paper got accepted December 04, 2014
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Canto Ostinato
November 24, 2014
Incredible minimalist music for multiple pianos, by Simeon Ten Holt.
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Natural Selection and Student Evaluations
November 22, 2014
> There is an undoubted relationship between teaching effectiveness and popularity. Certainly, an instructor, who cannot engage in person to person relationships or who would be disliked as an...
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به دنبال داروین
November 21, 2014
تنها چیزی که یادم میاد در مورد داروین تو کتابهای درسیمون نوشته شده بود یه جمله بود تو این مایهها که: «نظریهای هم وجود دارد به نام نظریه انتخاب طبیعی که به وضوح غلط است». این یکی دو سال اخیر زندگیم...
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The Prisoner of Stress
November 19, 2014
> This is the hand the student of anxiety is dealt. But he can pick only one card. The existentialist’s anxiety, the psychoanalyst’s anxiety, and the anxieties of theologians, sociologists, and...
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An Eastern Love Story
November 18, 2014
Astounding music by Nasser Shamma. From post:
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What would you do in CS Education Week?
November 17, 2014
Well, I'm planning on taking my Statistics students to a computer lab and introduce SQL to them through Khan Academy's Hour of Code program. What would you do?
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For a cold and gloomy Sunday
November 17, 2014
-- Listen to the whole album here.
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Wishes
November 14, 2014
I want to become a good mathematician, and on top of that, to have enough money to support good students to come and work with me. It's a pity that some great mathematicians can't support their...
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در این گوشه که از عالم بیرون است
November 13, 2014
یکی از چیزایی که شاید باعث شده باشه به نسبت معلم خوبی شده باشم (دانشجوهام اینطور فکر میکنن) یا حداقل تلاشم رو کرده باشم که معلم خوبی باشم تا اونجایی که در توانم هست، این بوده که معلمهای بدی داشتم و...
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Ludovico Einaudi - In a time lapse
November 13, 2014
Listen to the full album: YouTube
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To Settle Infinity Dispute
November 11, 2014
> Mathematics has a reputation for objectivity. But without real-world infinite objects upon which to base abstractions, mathematical truth becomes, to some extent, a matter of opinion. The choice...
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My Dark Place, by The Secret Trio
November 11, 2014
Ara Dinkjian - oud Tamer Pinabasi - kanun Ismail Lumanovski - clarinet
- Khayyam November 10, 2014
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Stone of patience
November 09, 2014
One interesting movie. IMDB
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Nebraska
November 09, 2014
This is one of those movies that doesn't tell you much, it lets you feel it yourself. IMDB
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پشت تپه هم روزی نبود
November 04, 2014
دارم وبسایت دانشگاهی رو بالا پایین میکنم دنبال کار که میبینم نوشته: «بفهم. همه چیز از تو شروع میشه!». یاد چند سال پیش میافتم که همه چیز تاریک بود و کمکم داشت روشن میشد، اما نورِ پشت تپه همچنان...
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Listen
November 03, 2014
By Vivaldi and Piazzolla!
- Harlem November 03, 2014
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What is Halloween?
November 01, 2014
> Oh, it's just an(other) excuse to dress up silly, get drunk, and not go to classes!
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Unilluminated pool tables
November 01, 2014
Yesterday I gave a colloquium talk at WIU and as a tradition the department head gave me a book. The book is called The Ph$\gamma$sics Book: From the Big Bang to Quantum Resurrection, 250 Milestones...
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Fixing the PhD
October 27, 2014
> If anything, a continuing over-production of Ph.D.s will only make the problem worse. It creates an ever-growing pool of cheap labor, which administrators are only too happy to employ in place of...
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Ryo Fukui
October 26, 2014
Ali suggested this song. It's amazing:
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زین به پشت؟
October 24, 2014
دانشجوی لیسانس که بودیم یه زمانی به سرمون زد که برای ادامه تحصیل بریم خارج از ایران. دلیلش شاید بیشتر از همهچیز این بود که آینده جالبی برای خودمون نه میدیدیم نه تصور میکردیم. در همین فکرها بودیم...
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Why did we?
October 21, 2014
I have students asking me why did we buy this book, and I've always had a hard time understanding that question, let alone answering it in a convincing way. Until I read the following. > "This is why...
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که با این «دَر» اگر در بند درمانند دَر مانند!
October 14, 2014
یه زمانی فکر میکردم که زندگی تو کشوری امریکا باید خیلی بهتر از خیلی جاهای دیگه باشه، از خیلی جهات. الان اگه کسی بیاد و برام از «امریکن دریم» صحبت کنه خنده که نمیشه گفت، دلم براش میسوزه، سعی میکنم کمی...
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درس گرفتیم از دوستی
October 14, 2014
یکی از کمترین فایدههای داشتن دوستای خوب اینه که آدم ازشون چیز-میز یاد میگیره. اینکه این چیز-میزا رو بهت بگن با اینکه با رفاقت کردن باهاشون یاد بگیری دو چیز متفاوتیه، چون تا دلت بخواد حرف و حدیث و...
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Culture Shock!
October 04, 2014
It's been very busy here in Illinois. But away from all the moving, getting used to new things and a lot of courses that I have to teach, I had more of a culture shock when I moved from WY to IL,...
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شب
September 25, 2014
خب گاهی هم آدم خوابش نمیبره اون موقع که باید خوابش ببره. داشتم به این فکر میکردم که داشتن دوستای خوب که بَرِت دارن ببرن اینور اونور کارای مختلف بکنی خیلی خوبهها. مخصوصا اینکه وقتم پره و هی نمیخوام...
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کاری
September 24, 2014
راحول اهل هنده. از همون روزهای اولی که اومدم اینجا باهاش آشنا شدم. اونم هیات علمی جدیدیه که دانشگاه استخدام کرده و کارش «ارتباطات» هست. دو بار تا حالا با هم رفتیم پینگپنگ بازی کردیم. بازیش خوبه ولی...
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پزشک دهکده
September 23, 2014
بالاخره نمردیم و ما هم مثل این آدمای باکلاس برای خودمون دکترِ خانوادگیدار شدیم. هرچند خانوادهمون یهنفرهست! دکترم رو امروز برای اولینبار دیدم. تو نیویورک بزرگ شده و تو شیکاگو تحصیلاتش رو تموم...
- El Consenso, by Omar Sosa September 22, 2014
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اول مهر
September 21, 2014
همیشه همینطور بوده. روز اول دست و دل آدم به کار نمیره و ترجیح میده فقط بشینه و آهنگ گوش کنه. اما مثل اینکه گذر سالها باعث شده که این تنبلیِ روز اول تبدیل به یک رسم بشه که مهر دلت نخواد کار کنی. چه...
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کار
September 20, 2014
با رییس دانشکده صحبت میکردم. میگفت که معلوم نیست سال دیگه برام جا داشته باشن. گفت اگه که ویزیتینگ بخوان خوشحال میشه که منو نگه داره اینجا اما برای ویزام کاری نمیتونه بکنه. گفت که «رسم» نیست که...
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شنبه عصر
September 20, 2014
نشستم تو خونه چایِ استخدوسی که علی بهم معرفی کرده و دوستش دارم رو میخورم و آهنگ گوش میدم. ماهی توی فر در حال پختنه و برنج هم رو گاز داره دم میکشه. خونه رو امروز مرتب کردم و پوسترهایی که خریده بودم رو...
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ویزا
September 19, 2014
پدر و مادرم چند ماهی هست که اقدام کردن برای اینکه ویزا بگیرن و بیان اینجا که منو بعد از پنج سال ببینن. هنوز وضعیتشون مشخص نیست. یه ایمیلی رسید هفته پیش که ویزاتون آمادست بیاین بگیرینش. اما شمارهش با...
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بالای تپه
September 19, 2014
اینجا بی سرو صداست. کسی کاری به کارم نداره. البته نه اینکه هیچیِ هیچی ها، اما کارِ خاصی باهام ندارن اکثر آدمای دور و برم. همسایه هام رو به زور میبینم. یکیشون کشیشه و اسمش هست دِریل. یکیشون هم...
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Macomb
August 31, 2014
The first week of the new semester is over, and it seems like I'm settling down. Time to get back on some life and math.
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What's been happening in my life recently
July 20, 2014
I got hired at Western Illinois University as a visiting assistant professor and I'll start my job mid August.
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Love and math
July 20, 2014
I just read a book called "Fermat's last theorem" by Simon Singh, and I think it was awesome. I actually listened to the audio version of it. The book does not assume any prior knowledge of...
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Big day coming
July 10, 2014
I'm defending my PhD in 13 hours.
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Some events
July 08, 2014
So, the last days of living in Laramie and here are a few things happening:
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Neuoromath
June 16, 2014
Today, I'm going to Snowbird, UT, to participate in an Mathematics Research Communities 2014 workshop, where I'll learn about algebraic and geometric approaches in neuroscience. Here is the link:...
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still life!
June 14, 2014
Listening to Larry Adler's Reflections, while sipping on my tea and adding the last bits to my dissertation. A few more hours for today.
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Barcarolle in G minor
June 10, 2014
https://www.youtube.com/watch?v=jfWRrPpva00
- Happening today on campus June 05, 2014
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mathtalk
June 04, 2014
It's been almost three weeks (5 days a week, 75 minutes a day) that I am teaching elementary linear algebra, and I can already talk mathematics with my students. It's been very rewarding. I am...
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Progress
June 03, 2014
30 pages for the new paper. Almost done.
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Traveling Salesman, the Movie
June 02, 2014
https://www.youtube.com/watch?v=6ybd5rbQ5rU
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Dissertating
May 24, 2014
These days I'm working hard to finish writing my dissertation. I put an average of 12 hours a day in. It's started looking nice. One more chapter to write, then doing final edits, putting codes in,...
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Four fundamental subspaces
May 19, 2014
Gilbert Strang talking about his favorite topic at the Joint Math Meeting 2014, Baltimore, MD.
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Escher tie
May 19, 2014
A gift from a good friend :)
- Bar painting May 19, 2014
- Sundance, UT May 14, 2014
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History of Mathematics
May 13, 2014
History of Mathematics
- Loosing it May 12, 2014
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Graduation Selfie
May 12, 2014
I took a selfie with Farhad Jafari, our department head, on the stage after he hooded me.
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Trapped in Wyoming
May 11, 2014
I have to attend a conference in Utah but all the roads are closed due to snow! May 11, 2014.
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note
May 10, 2014
Listening Shostakovich all day is not a good sign I guess.
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TeXing with databases
May 09, 2014
It is happened to me many times that I have a database and I need to build multiple files PDF based on that database. Say, you have a list of people and their addresses and you want to send a generic...
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لطفی - اصفهان
May 09, 2014
> سایه: ... بعضی از کارهای لطفی رو طاقت ندارم بشنوم اصلاً... > مثلاً کدوم کار؟ > یه بیات اصفهان داره که تو چاووش زده و تو یکی از نوارهای چاووش هم هست، ظاهراً چاووش ۸. یه شب جایی مهمان بودیم، لطفی...
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Write Latex
May 06, 2014
Another online $\LaTeX$ editor.
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The case of the missing fractals
May 06, 2014
The case of the missing fractals
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Zoe
May 05, 2014
Zoe Keating's concert was amazing. Out of the big concerts that I have gone to during the past few years, hers exactly matched my (very high) expectations, not more, not less. She is constantly...
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Cinco de Mayo 2014
May 05, 2014
> Shagha — May 6, 2014 > > haha! oon daste kie? :P
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Zoe Keating Concert in Boulder
May 03, 2014
Zoe Keating Concert in Boulder
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Permanent & Determinant: Non-identical Twins
May 03, 2014
> Permanent & Determinant: Non-identical Twins > Tuesday, May 20, 2014 > > The determinant is undoubtedly the most important polynomial function in mathematics. Its lesser known sibling, the...
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Google Now for parking
May 02, 2014
> Google Now for Android will automatically remember where you parked link: http://arstechnica.com/gadgets/2014/05/google-now-for-android-will-automatically-remember-where-you-parked/
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Listen to the MUSTN'TS
May 01, 2014
Shel Selverstein Where the sidewalk ends
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I'm giving a math talk tomorrow
April 29, 2014
Algebra, Combinatorics, and Number Theory Seminar Ross Hall 247 3:10pm, Tuesday, 29 April 2014