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 4 Nov 2019
    • Report Tweet
    • Report NetzDG Violation

    Gilbreath’s conjecture: take the sequence of prime numbers and calculate the absolute differences. The pattern is irregular except for the left edge, which after the initial 2 is always 1. To this day, no one has been able to prove it.pic.twitter.com/r3T4ByqZfi

    6:36 AM - 4 Nov 2019
    • 549 Retweets
    • 2,600 Likes
    • Matte1205 MainDavis FERMAT Nikodem Śmigielski Puneet Singh Ludu Hallelujah Anasuya Jan Duthel Casper Koomen joao
    24 replies 549 retweets 2,600 likes
      1. New conversation
      2. Simon Gregg‏ @Simon_Gregg 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Ooh, that's interesting... I wonder what other sequences do...?pic.twitter.com/YcjxD00OLz

        10 replies 5 retweets 72 likes
      3. This Tweet is unavailable.
      4. 1 more reply
      1. Anders Sandberg‏ @anderssandberg 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        The 0-2 dynamics is apparently Wolfram's rule 90, preserving the 1. So the real challenge is to prove that the extended dynamics due to other numbers in the initial transient never manages to persist. Could well be halting-complete.pic.twitter.com/ac6m4cGH1Q

        1 reply 2 retweets 31 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. SpatialH  👩‍💻‏ @SpatialH 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        All prime numbers after 2 are odd. The 1 falls out of prime numbers being (1 + two times a number). so I’ll go look up Gilbreath’s conjecture and see why you can’t prove this...

        2 replies 0 retweets 23 likes
      3. Georg Stoeger ن‏ @geostoe 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @SpatialH @fermatslibrary

        All differences except column 1 are even, but they can be quite large for large primes. A proof would require to show that the differences per iteration in the matrix shrink faster than the differences between adjacent primes grow. Experimentally it looks true.

        1 reply 0 retweets 4 likes
      4. End of conversation
      1. Carl Smith‏ @CarlSmith314 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        I have a proof but it is too large to fit in this tweet.

        2 replies 0 retweets 22 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Brad‏ @BculkinBrad 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary @LoganMohtashami

        Kind of makes you want to re examine the argument that 1 is not prime.

        2 replies 0 retweets 13 likes
      3. Jason Forrest‏ @tenlinesofcode 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @BculkinBrad @fermatslibrary @LoganMohtashami

        If 1 were considered prime, the left edge would alternate 1 & 0 after the initial row. It wouldn't be all 1s. Or maybe I missed your point?

        2 replies 0 retweets 1 like
      4. 1 more reply
      1. Roger Sauer‏ @rsauer3473 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Adept at bowling, Clyde Hough-Remington (1952-1919) set up pins with these numbers at an alley in Wolverhampton in 1889. It took 19 attempts to knock down all pins save those on the left side. “Proven!” he exclaimed.

        1 reply 0 retweets 9 likes
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Jon Graystone‏ @jon_graystone 4 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @fermatslibrary

        Apparently, Paul Erdős speculated that Gilbreath’s conjecture is true but it would be 200 years before anyone could prove it.https://mathoverflow.net/questions/34669/is-there-any-progress-toward-solving-gilbreaths-conjecture …

        2 replies 0 retweets 8 likes
      3. (the other) Steve Hoffenberg‏ @SteveHoffenberg 5 Nov 2019
        • Report Tweet
        • Report NetzDG Violation
        Replying to @jon_graystone @fermatslibrary

        At any mention of Paul Erdős, I am obliged to cite his great quotation: "A mathematician is a device for turning coffee into theorems."

        1 reply 0 retweets 1 like
      4. 2 more replies

    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