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 27 Dec 2017
    • Report Tweet
    • Report NetzDG Violation

    The Four Color Theorem was first proposed by Francis Guthrie in 1852. This theorem states that given any separation of a plane into contiguous regions no more than four colors are required to color the regions of the map so that no two adjacent regions have the same color.pic.twitter.com/ka4KuHcSYA

    6:06 AM - 27 Dec 2017
    • 335 Retweets
    • 1,013 Likes
    • min/Δ David kub Vitor Batalha AI Briefly 卐 Ivan Timothy Halim 🇹🇷BASKAN RTE🇹🇷 Don Pettygrove
    14 replies 335 retweets 1,013 likes
      1. New conversation
      2. Daheim-Verbringer Bort‏ @victorolosaurus 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        and you illustrated that using five colors and non-contiguous regions?

        1 reply 1 retweet 34 likes
      3.  🌹 🏴🅖🅐🅡🅜🅞🅝 🅱️🅞🅩🅘🅐 🏴 🌹‏ @elderbong 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @victorolosaurus @fermatslibrary

        It's sometimes called the map coloring problem. Disregard the water and consider each landmass separately.

        1 reply 0 retweets 6 likes
      4. 2 more replies
      1. New conversation
      2. Erwin Quakenstein‏ @linkerdodi 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        What about this one? Did I get something wrong?pic.twitter.com/k4NZeYwnzk

        3 replies 0 retweets 2 likes
      3. Jayson Harshbarger‏ @hypercubed 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @linkerdodi @fermatslibrary

        Can be dine with three colors. Touching corners do not count.

        1 reply 0 retweets 10 likes
      4. 1 more reply
      1. Seeker‏ @SevenPolaris 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        This theorem is brilliant as its making required a substantial amount of careful observation. It's similar to Langrange four-square theorem.pic.twitter.com/YMgk7r1svu

        0 replies 1 retweet 4 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. That guy‏ @ThisGuyThatGuy_ 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        I think it's worth mentioning that the current accepted proof of the theorem actually lists all the 'kinds' of maps that are possible, and tests that each one of them can be coloured with 4 colours.

        0 replies 0 retweets 5 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. Seeker‏ @SevenPolaris 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Theorems like this one put limitations to our fancy regarding patterns of nature & show fixedness. Choose your favorite 'limitation' theory.

        0 replies 1 retweet 1 like
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Daheim-Verbringer Bort‏ @victorolosaurus 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation

        no, neighboring in the sense of the theorem means having a common border with finite length

        1 reply 0 retweets 0 likes
      3. kevin ji‏ @mrjimath 27 Dec 2017
        • Report Tweet
        • Report NetzDG Violation
        Replying to @victorolosaurus @OFehrMedia @fermatslibrary

        I think he’s asking about something like this, where many of the vertices contain more than four angles around them. Yes — this still works; you may have the same color meeting at a shared vertex, but you can still avoid a shared edge with only four colors.pic.twitter.com/JDOJD1sNnS

        0 replies 1 retweet 1 like
      4. End of conversation
      1. New conversation
      2. Mathias Schilling  💾‏ @MatChilling 2 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        The problem remained unsolved for over 100 years 🤓 #trivia

        1 reply 0 retweets 0 likes
      3. Mathias Schilling  💾‏ @MatChilling 2 Jan 2018
        • Report Tweet
        • Report NetzDG Violation
        Replying to @MatChilling @fermatslibrary

        I've written a blog post using the 4 color theorem as an example for an introduction to #prolog and #logicprogramminghttps://www.matchilling.com/introduction-to-logic-programming-with-prolog/ …

        0 replies 1 retweet 1 like
      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