Alex Kontorovich

@AlexKontorovich

professor at . Editor-in-Chief of Experimental Mathematics . Dean of Academic Content at . Advisory Board at

Vrijeme pridruživanja: studeni 2018.

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  1. Prikvačeni tweet
    23. ruj 2019.

    Collecting here a meta-thread of threads.

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  2. proslijedio/la je Tweet
    31. sij

    NSF's Division of Mathematical Sciences in collaboration with the Simons Foundation has just announced a new $20M funding opportunity on the Mathematical and Scientific Foundations of Deep Learning. Learn more about it at

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  3. 1. velj

    Little one: Daddy, why was -2 afraid of 3? Me: ...? LO: Cause 3, 8, 13! :)

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  4. 1. velj

    3/3 the first 100 pliers, then the next 100, and the last 32. You need different kinds of tape (Scotch, then packing, then duct) in each section, but after 100 more technicalities, you’d have your contraption. Press the first plier down, hard as you can, and pop goes the nut.

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  5. 1. velj

    2/ seems impossible. He’d make pliers from scratch, and observe that they amplify force, but only by 1%. So coupling 232 of these will amplify force by (1.01)^232=10.06, plenty. Problem is, they don’t couple well. So he would build a contraption to hold them, in three parts,

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  6. 1. velj

    Thought about Grothendieck vs Bourgain some more; my analogy would be more like: Yes, Grothendieck would put the nut in water, wait a few days, and it would open on its own. Bourgain would observe that your fingers alone need to be 10x as forceful to crack the nut, (cont’d)

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  7. 1. velj

    2/ “As a teacher, [Courant] was good when he prepared, which was seldom” “Morrey understood lots of things, but he was hard to understand” “[At Courant] there was hardly any difference between pure and applied. There was just mathematics” “We could take turns playing Gelfand”

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  8. 1. velj

    RIP Louis Nirenberg, Prof Emeritus at NYU’s Courant Institute, winner of numerous prizes (Abel, Crafoord, Steele x2, Natl Medal Science, etc) for work in analysis/geometry/PDE Great interview in Notices, so many great quotes, e.g

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  9. proslijedio/la je Tweet
    1. velj

    Program: 2021 Fellows of AMS - American Mathematical Society, Fellows of the AMS - US, world...

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  10. proslijedio/la je Tweet
    31. sij

    A new prize, the Ladyzhenskaya medal in mathematical physics, has been announced by the National Committee of Mathematicians of Russia, St Petersburg State University, and, for the inaugural prize, the Organizing Committee of the ICM. /1

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  11. 1. velj

    Not to mention, one of the best Algebra books ever... (And Realm of Numbers, etc...)

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  12. proslijedio/la je Tweet
    1. velj

    Isaac Asimov, the indefatigably curious chemist and science-fiction icon championed rationality for the common good in 20 million published words

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  13. 1. velj

    The main point of this part of the discussion was the line (no pun intended): “No human being has *ever* seen actual parallel lines.” All of Euclid’s plane geometry is merely an illusion...

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  14. proslijedio/la je Tweet
    31. sij
    Odgovor korisnicima

    Suppose you have fixed power density, and the sun is of (variable) radius r. The energy flux at the surface - the thing frying you - scales as power density * volume / surface. That's proportional to the radius. The Sun is just a really, really big compost heap!

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  15. proslijedio/la je Tweet
    31. sij

    seeing curvy triangles everywhere! Thanks for that! 😀

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  16. proslijedio/la je Tweet

    GREAT WOMAN OF MATHEMATICS: DR. JUDITH RESNICK, 1949-1986. Daughter of Russian immigrants. Both the first Jewish woman and the first American Jew in space. She earned bachelor's and PhD degrees in electrical engineering after deciding against a career as a concert pianist, 1/5

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  17. proslijedio/la je Tweet

    Joys and Challenges of Teaching Math in Jail. News of Math Circle and math course taught by Annie Raymond Also see Dec 2019 Notices

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  18. 31. sij

    Great problems! What’s your favorite? (And favorite solution?)

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  19. 31. sij

    Heartbreaking anecdotes here. “More concerned with placating upset students and parents than backing up teachers, [administrators] would accept absurd excuses and tolerate unacceptable behavior.” Is it really this bad at so many places?

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  20. 31. sij

    My old friend, you have served me well. And now it is time to dust you off, and send you on to the next generation.

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  21. proslijedio/la je Tweet
    30. sij

    Ready 🔴 Set 🟡 Register 🟢 Open Registration for the 2020 MƒA Winter/Spring semester is now live on the SWN! We’re thrilled to offer hundreds of unique and exciting learning opportunities, many led by our teachers. MƒA teachers, what are you registering for?

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