Marcello Seri

@marcelloseri

Maths, lambdas and rock'n'roll. Assistant Professor at the Bernoulli Institute for Mathematics, Computer Science and Artificial Intelligence. Tweets are my own

Groningen, Nederland
academic.mseri.me
Vrijeme pridruživanja: srpanj 2007.
345 fotografija ili videozapisa Fotografije i videozapisi

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  1. proslijedio/la je Tweet
    2. velj

    Some interesting names on this mathematically minded tweet:

    5 replies 24 proslijeđena tweeta 101 korisnik označava da mu se sviđa
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    2. velj

    Earth physically rotates in 23hours 56min relative to distant stars – a Sidereal Day, BUT it takes 24hours to rotate relative to the Sun – a Solar Day The difference? Earth orbits the Sun, so the Sun appears to move (down, in the vid), which means Earth needs +4mins to catch up!

    59 replies 1.334 proslijeđena tweeta 3.795 korisnika označava da im se sviđa
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    1. velj

    🥳02/02/2020 Happy International Palindrome Day! Today is a palindromic date whether you use the MM/DD/YYYY or the DD/MM/YYYY system. The next time this happens will be 12/12/2121 so make sure you take the time to yell a nerdy HAZZAH today because that's a palindrome too!

    29 replies 900 proslijeđenih tweetova 1.700 korisnika označava da im se sviđa
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  4. proslijedio/la je Tweet
    28. sij

    As you keep zooming in, you think: it's a point! No, it's a line! No, it's a rectangle! No, it's a bunch of points! No... It's a subset of the plane invented by Simon Willerton, which shows that your estimate of the dimension can keep changing as you zoom in more and more.

    13 replies 53 proslijeđena tweeta 257 korisnika označava da im se sviđa
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  5. proslijedio/la je Tweet
    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)

    Click on the screen below to hear a fun little snippet of my conversation with in this week's "The Joy of x" podcast, as he recalls how inhibited he felt (at first) when working with the great mathematician Jean Bourgain.
    1 reply 10 proslijeđenih tweetova 38 korisnika označava da im se sviđa
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    1. velj

    If you were inside an orbiting space station that rotated to keep one face towards the body it orbited, some free falling objects would execute elliptical motion around the centre of the station.

    1 reply 7 proslijeđenih tweetova 46 korisnika označava da im se sviđa
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    1. velj

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  8. proslijedio/la je Tweet
    21. tra 2019.

    During a gravitational elliptic orbit, the path traced by tip of the velocity vectors (collected together as to have a common origin) is a circle 😲 (made with )

    17 replies 282 proslijeđena tweeta 1.155 korisnika označava da im se sviđa
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  9. proslijedio/la je Tweet
    31. sij

    Newtonian gravitation in a curved surface (warped space-time): is it possible to reproduce an inverse square Newtonian force (and an elliptic orbit) with a simple kitchen plate? (that’s totally useless but I couldn’t help working on it) (click/tap to pause - made with )

    15 proslijeđenih tweetova 46 korisnika označava da im se sviđa
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  10. proslijedio/la je Tweet
    30. sij

    I updated my post about the Janus cosmological model to include an explanation of in terms of a gravitational lensing enhancement due to the effect of light traveling through a negative-mass medium.

    5 proslijeđenih tweetova 14 korisnika označava da im se sviđa
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  11. proslijedio/la je Tweet
    30. sij

    ⬅ I bet you like that

    1 reply 1 proslijeđeni tweet 2 korisnika označavaju da im se sviđa
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  12. proslijedio/la je Tweet
    29. sij

    Just what I was looking for – mapping class groups as sweaters being put on by a torus. Beautiful analogies 👇🏽!

    I’m back! Having a busy month moving and settling in , but this hasn’t totally kept me away from making cool pictures :) Here’s a depiction of an Anosov mapping class on a torus 1/n
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  13. proslijedio/la je Tweet
    29. sij

    The skills you need to pass exams and the skills you need to do research are (very) different. So exam grades are a very poor predictor of how good you can be at doing science. (I was a B student at best)

    I was a C student in physics. And the only reason I didn’t change my major was that, in my head, I was going into an applied program so it was ok because I “wasn’t trying to be a real physicist” The irony of being hired for a physics professor position is not lost on me.
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  14. 28. sij

    These notes on analytical mechanics are such a pleasure to read that I feel an incontrollable urge to disseminate them further: It’s wonderful to see such pearls legally and freely available online

    2 proslijeđena tweeta 5 korisnika označava da im se sviđa
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  15. proslijedio/la je Tweet
    27. sij

    Finished it. Full size download, extra info, and all that jazz over at Flickr:

    65 replies 332 proslijeđena tweeta 1.374 korisnika označavaju da im se sviđa
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  16. proslijedio/la je Tweet
    28. sij

    Who needs this?

    48 proslijeđenih tweetova 177 korisnika označava da im se sviđa
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  17. proslijedio/la je Tweet
    28. sij

    DELETE YOUR FACEBOOK ACCOUNT

    Scoop: Facebook has tapped former Fox News executive producer Jennifer Williams to head video strategy for Facebook News, the dedicated news tab that will launch wide later this year, a source familiar with the move tells me.
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    28. sij

    Yes, library staff of the did it again! During our lunch break we improved 29 articles in by adding citations. Edited articles ranged from feminist philosophers to Frankfurt train stations to Scandinavia, baseball player Ty Cobb and Armenia.

    1 reply 18 proslijeđenih tweetova 57 korisnika označava da im se sviđa
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  19. proslijedio/la je Tweet
    26. sij

    Here’s an animation I made for my lectures.

    7 replies 39 proslijeđenih tweetova 166 korisnika označava da im se sviđa
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  20. proslijedio/la je Tweet
    25. sij

    Our and bindings for are now compatible with PyTorch 1.4, updated opam package/crate are available! A bunch of examples can be found on GitHub, RNNs, GAN, Reinforcement Learning...

    7 proslijeđenih tweetova 26 korisnika označava da im se sviđa
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