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juliagalef's profile
Julia Galef
Julia Galef
Julia Galef
Verified account
@juliagalef

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Julia GalefVerified account

@juliagalef

SF-based writer & speaker focused on reasoning, judgment, and the future of humanity. Host of the Rationally Speaking podcast (@rspodcast)

San Francisco
juliagalef.com
Joined January 2009

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    Julia Galef‏Verified account @juliagalef 1 Sep 2018

    This is... deeply unsettling. Source: https://www.futilitycloset.com/2018/02/02/breakdown-2/ …pic.twitter.com/RT0KYQIFde

    4:34 PM - 1 Sep 2018
    • 1,711 Retweets
    • 5,527 Likes
    • Frederico Glenn Heller John Burger 🖤 Gökhan Turhan BatteryBabe1 Sap P. Geerkens ⭐️⭐️⭐️ Shetland E Ferus Brasidas
    120 replies 1,711 retweets 5,527 likes
      1. New conversation
      2. gwern‏ @gwern 1 Sep 2018
        Replying to @juliagalef

        If you really want to troll someone, make a graph of the version with '2*cos(t)' which the paper says goes all the way up to 111 (!) before breaking down at 113.

        5 replies 13 retweets 206 likes
      3. Julia Galef‏Verified account @juliagalef 1 Sep 2018
        Replying to @gwern

        shiiiiiiit

        1 reply 0 retweets 64 likes
      4. Evan Daniel‏ @evanbd 1 Sep 2018
        Replying to @juliagalef @gwern

        WP has a bit more. In particular, the first integral breaks when 1/3 + 1/5 + ... + 1/15 > 1, and the second when 1/3 + ... + 1/115 > 2. https://en.wikipedia.org/wiki/Borwein_integral …

        0 replies 5 retweets 61 likes
      5. End of conversation
      1. New conversation
      2. Chan‏ @chandler_baxter 1 Sep 2018
        Replying to @juliagalef @bwecht

        I have no clue what this means but, "this is proof the universe is a simulation" is it possible someone can help with laymens terms? I only speak Associates at best 😅

        4 replies 0 retweets 6 likes
      3. Gabe is NOT @kubecon‏ @itsgabethebando 2 Sep 2018
        Replying to @chandler_baxter @juliagalef @bwecht

        I'll give this a whack. Okay so *generally speaking*, in mathematics one of the strongest forms of proof is proof by induction. This works by saying the following: Okay, this seems to work at n=1, n=2, and n=3. So let's try and show that given n=x is true, show n=x+1 is true.

        3 replies 1 retweet 22 likes
      4. Gabe is NOT @kubecon‏ @itsgabethebando 2 Sep 2018
        Replying to @itsgabethebando @chandler_baxter and

        Thus, if it holds, for all x the statement is valid because we know x-1 is valid, and thus x-2, all the way down to the cases we proved directly.

        1 reply 1 retweet 8 likes
      5. Gabe is NOT @kubecon‏ @itsgabethebando 2 Sep 2018
        Replying to @itsgabethebando @chandler_baxter and

        Here, we have a problem which shows that a particular sequence of operations equals exactly pi/2. This is significant because mathematicians love finding pi in everything. It's kind of cool that we can directly represent pi with things we can calculate to arbitrary precision.

        1 reply 1 retweet 11 likes
      6. Gabe is NOT @kubecon‏ @itsgabethebando 2 Sep 2018
        Replying to @itsgabethebando @chandler_baxter and

        But in this case, the sequence breaks down, and only BARELY, some 7 or 8 iterations in. That's fascinating and not obvious, and according to the original paper the reason has to do with the behavior of this sequence at certain points, and it just sort of magically doesn't work.

        2 replies 2 retweets 14 likes
      7. Gabe is NOT @kubecon‏ @itsgabethebando 2 Sep 2018
        Replying to @itsgabethebando @chandler_baxter and

        The reasons why are complicated and I barely understand them, but the fact that a seemingly perfect sequence breaks down so subtly (less than 0.00000001% error!) Is absolutely fascinating.

        1 reply 1 retweet 18 likes
      8. Chan‏ @chandler_baxter 2 Sep 2018
        Replying to @itsgabethebando @juliagalef @bwecht

        I see so, since the seemingly endless pattern broke for no reason, and people cant tell exactly why, it comes off as breaking some fundamental rule of the universe?

        1 reply 0 retweets 7 likes
      9. Gabe is NOT @kubecon‏ @itsgabethebando 2 Sep 2018
        Replying to @chandler_baxter @juliagalef @bwecht

        It's not that people can't tell why-we can actually mathematically describe why this happens, but it's pretty spooky that this inconsistency happens. Usually in math, there are three kinds of results: that it never happens, that it happens once, and that it happens infinitely.

        1 reply 2 retweets 70 likes
      10. 6 more replies
      1. Apex‏ @based_apex 1 Sep 2018
        Replying to @juliagalef @qlutoo

        We live in a simulation and that's just floating point rounding errors

        0 replies 7 retweets 138 likes
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      1. New conversation
      2. Leonid Kruglyak‏ @leonidkruglyak 1 Sep 2018
        Replying to @juliagalef

        That’s awesome. Law of small numbers strikes again. For more examples:https://math.stackexchange.com/questions/111440/examples-of-patterns-that-eventually-fail …

        1 reply 21 retweets 145 likes
      3. 1 more reply
      1. Nick Barnes‏ @nickbarnes 2 Sep 2018
        Replying to @juliagalef

        It gets better.pic.twitter.com/AxW6hQCWgV

        0 replies 11 retweets 56 likes
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      1. New conversation
      2. Danalyst‏ @DavidAnalyst 1 Sep 2018
        Replying to @juliagalef

        Some math is indeed useless. Taylor series, this, and fractals

        16 replies 1 retweet 6 likes
      3. eleanor‏ @noneuclideangrl 1 Sep 2018
        Replying to @DavidAnalyst @juliagalef

        .....this is a WILD claim

        1 reply 1 retweet 51 likes
      4. Danalyst‏ @DavidAnalyst 3 Sep 2018
        Replying to @noneuclideangrl @juliagalef

        Calc 2:Heres liebnitz's work, Newton's work from 1600s. heres a funny picture that they use in movie mountains. Heres something that everyone says is super important but only a couple engineers use.

        0 replies 0 retweets 1 like
      5. End of conversation
      1. New conversation
      2. Mike Sealander, AIA‏ @MikeSealander 1 Sep 2018
        Replying to @juliagalef

        Reality is mathematical, but math is not rational. Honestly, I love reality. Understanding the math is icing on the cake.

        2 replies 1 retweet 8 likes
      3. DarkJellyBean‏ @DarkJellyBean42 1 Sep 2018
        Replying to @MikeSealander @juliagalef

        Now I want cake and pie...

        2 replies 0 retweets 3 likes
      4. Kyle Rogers  🏳️‍🌈‏ @kyrogers 3 Sep 2018
        Replying to @DarkJellyBean42 @MikeSealander @juliagalef

        In this problem, you only get half a pi, no cake. And after seven times, less than half. Something's eating our pi.

        0 replies 1 retweet 7 likes
      5. End of conversation

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