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paulg's profile
Paul Graham
Paul Graham
Paul Graham
Verified account
@paulg

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Paul GrahamVerified account

@paulg

paulgraham.com
Joined August 2010

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    Paul Graham‏Verified account @paulg 15 Aug 2020

    Paul Graham Retweeted John McCafferty

    The numbers over the beds in this painting show how long it took for decimal numerals to replace Roman in common use. European mathematicians started using decimal in the tenth century, but in everyday situations Roman numerals remained the norm for centuries afterward.https://twitter.com/jdmccafferty/status/1294612624382951426 …

    Paul Graham added,

    John McCafferty @jdmccafferty
    Cornelis de Wael, 1592-1667. The Guests of Honour Visiting a Hospital Flanders, between 1640 and 1644 (The Hermitage Museum) pic.twitter.com/9CJOKrWX7Q
    5:49 AM - 15 Aug 2020
    • 60 Retweets
    • 376 Likes
    • TruthQuest Question Everything Arseny Khakhalin Kenneth Cukier Kyle Bogosian 💡 Azathoth Liberation Front Chinglican ☩ 曾履義 ن Mahesh  Ratnakar viral
    23 replies 60 retweets 376 likes
      1. Paul Graham‏Verified account @paulg 15 Aug 2020

        "Outside Italy most merchants continued, however, to keep their accounts in Roman numerals till about 1550, and monasteries and colleges till about 1650..." — W. W. Rouse Ball, A Short Account of the History of Mathematics

        8 replies 18 retweets 133 likes
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      1. Rerarom‏ @rerarom 15 Aug 2020
        Replying to @paulg

        what is rarely mentioned is that astronomers already had the benefit of positional numerals because they (e.g. Ptolemy's Almagest) used Babylonian ones

        0 replies 0 retweets 1 like
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      2. Killuminati‏ @AndoAnima 15 Aug 2020
        Replying to @paulg

        How many more centuries will it take for Americans to move to the clearly superior metric system?

        1 reply 0 retweets 2 likes
      3. Nominal Cog‏ @cognominal 15 Aug 2020
        Replying to @AndoAnima @paulg

        I spent 3 years in the silicon valley and could not get used to Farenheit degrees.

        0 replies 0 retweets 1 like
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      2. Ben Gray‏ @0xGray 15 Aug 2020
        Replying to @paulg

        So what you’re saying is Americans will finally adopt the metric system in about 2420

        1 reply 0 retweets 20 likes
      3. Manuel Hernandez  🇺🇸‏ @manuelhe 15 Aug 2020
        Replying to @0xGray @paulg

        You can imagine Descartes hanging out with that crowd, thinking there was a better way to label the beds and arrange them in a grid.

        0 replies 0 retweets 2 likes
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      2. Feynman‏ @feynman2020 15 Aug 2020
        Replying to @paulg

        Most people take it for granted how awesome the decimal number system is. And it's even more insane that Indian mathematicians came up with it between 1st and 4th centuries. It's sad that India is no longer in the frontier of maths. Hopefully it will come back.

        1 reply 0 retweets 2 likes
      3. Joshua Z‏ @JoshuaZed1 15 Aug 2020
        Replying to @feynman2020 @paulg

        India has been very involved in math and physics in the last 100 years. The most famous is Ramanujan. But Bose and Chandrashekhar are almost as famous. In pure math today, one has people like the Murty brothers. IITB and IITD both have world class math departments.

        0 replies 0 retweets 4 likes
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      1. Omar Alshaker  🧙‍♂️‏ @alshakero 15 Aug 2020
        Replying to @paulg

        I don't know if this interpolation is apt. Because In Poland Roman numerals are still used to this day for ordinal needs. Also, hospitals are usually unique when it comes to language usage. In Arabic, they use really old-fashioned words to denote "room", "hall" etc.

        0 replies 0 retweets 1 like
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      1. Celso Martinho  🏠‏ @celso 15 Aug 2020
        Replying to @paulg

        We still teach Roman numerals in primary school, at least in Portugal.

        0 replies 0 retweets 5 likes
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