Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?

    New to Twitter?
    Sign up
fermatslibrary's profile
Fermat's Library
Fermat's Library
Fermat's Library
@fermatslibrary

Tweets

Fermat's Library

@fermatslibrary

A platform for illuminating academic papers. We publish an annotated paper every week. Our chrome extension for arXiv: https://fermatslibrary.com/librarian 

fermatslibrary.com
Joined September 2015

Tweets

  • © 2020 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list


    Under 100 characters, optional

    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    Fermat's Library‏ @fermatslibrary 15 Oct 2018
    • Report Tweet
    • Report NetzDG Violation

    Here's a surprisingly unsolved problem in math: Proof of the existence of the perfect Euler brick - a rectangular parallelepiped with integer-length edges, integer-length face diagonals, and an integer-length body diagonal.pic.twitter.com/iBsCyp3uIx

    6:09 AM - 15 Oct 2018
    • 709 Retweets
    • 2,206 Likes
    • tiveumaideia Thanos 卐 Leviathan Rods Ricky MetDk Vincent Lequertier 𝐅𝐞𝐥𝐩𝐬 Corpos ébrios em confusão #TeamJaida
    32 replies 709 retweets 2,206 likes
      1. New conversation
      2. Tamás Görbe‏ @TamasGorbe 15 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        The problem is to find 7 positive integers a, b, c, d, e, f, g such that • a²+b²=d², • a²+c²=e², • b²+c²=f², • a²+b²+c²=g². According to Wikipedia (https://en.wikipedia.org/wiki/Euler_brick …) it was shown that the length of the shortest edge must be greater than 5×10¹¹. So good luck everyone!

        4 replies 14 retweets 111 likes
      3. Rod Van Meter‏ @rdviii 15 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @TamasGorbe @fermatslibrary

        Is it known that a solution exists, but we just haven't found it yet, or is it an open problem whether or not it exists? Seems to be the latter, based on Wikipedia.

        2 replies 0 retweets 8 likes
      4. End of conversation
      1. Nicolas Lehuen‏ @nlehuen 15 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        I have a nice proof of this, but a tweet is too small to hold it.

        1 reply 0 retweets 54 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. McR42‏ @mcr42 15 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Like, 3²+4²+(3*4)² ?

        2 replies 1 retweet 5 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. Guilherme Togniolo‏ @gui_togniolo 17 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        @rationalexpec, olha que interessante. Os pontos dessa imagem são os vertices e diagonais do cubo. Elas todas aparentemente formam funções tangente. Se a função fosse descoberta, ela poderia dizer se existe um cubo nessa configuração?pic.twitter.com/9YNGozR9kj

        0 replies 0 retweets 1 like
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. This Tweet is unavailable.
      2. 1pak‏ @1pak2 19 Oct 2018
        • Report Tweet
        • Report NetzDG Violation

        2525 ? 693^2+140^2+480^2+2376^2=2525^2

        0 replies 0 retweets 1 like
      3. End of conversation
      1. Kemal Akcam‏ @Kemal_Akcam 15 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Is there any reward for solving it?

        1 reply 0 retweets 0 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Sudarshan Pradhan‏ @sanpradhn 24 Oct 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        a=3 b=4 c=5i d=5 e=4i f=3i g=0 is the smallest non-trivial solution. You can replicate this for all pythagorean triplets. Only point to note: 3 of the values have to be imaginary.

        1 reply 0 retweets 0 likes
      3. Sudarshan Pradhan‏ @sanpradhn 8 Nov 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @sanpradhn @fermatslibrary

        This was no wonder the last reply on this post. Must have set people thinking of a solution. I finally got it. It is now posted on my blog.

        0 replies 0 retweets 0 likes
      4. End of conversation

    Loading seems to be taking a while.

    Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

      Promoted Tweet

      false

      • © 2020 Twitter
      • About
      • Help Center
      • Terms
      • Privacy policy
      • Imprint
      • Cookies
      • Ads info