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increpare's profile
increpare
increpare
increpare
@increpare

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increpare

@increpare

• Makes games • Most recent commercial game : http://store.steampowered.com/app/1127680/Hy … • 💸 http://patreon.com/increpare  | http://github.com/sponsors/increpare … :D

Berlin, Deutschland
increpare.com
Joined September 2009

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    1. Ben‏ @BiCapitalize Mar 30
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      • Report NetzDG Violation

      An "inverse limit" is a limit, a "direct limit" is a colimit, and I think I'm going to commit a crime against whoever came up with that.

      13 replies 7 retweets 109 likes
    2. M L E P‏ @pitopos Apr 1
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      Replying to @BiCapitalize

      Yeah... i really like the terms projective and injective limits. I can never remember which is which. At least projective/injective tells you which way the arrows are going!

      3 replies 0 retweets 10 likes
    3. Brendan∧Murphy‏ @knotbrendan Apr 1
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      Replying to @pitopos @BiCapitalize

      I remember this by the fact that projective starts with p and the p-adics are like my only example of a projective limit 😅

      2 replies 0 retweets 2 likes
    4. M L E P‏ @pitopos Apr 1
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      Replying to @knotbrendan @BiCapitalize

      Oh i mean i can't remember which is the inverse and which is direct! Projective and Injective are perfectly clear terms to me.

      1 reply 0 retweets 3 likes
    5. John Carlos Baez‏ @johncarlosbaez Apr 1
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      • Report NetzDG Violation
      Replying to @pitopos @BiCapitalize

      -->-->-->-->--> direct limit inverse limit -->-->-->-->--> The direct limit is being pointed at, sitting in front of all the objects in your diagram, while the inverse limit is "behind" everything.

      2 replies 0 retweets 10 likes
    6. Tim Hosgood‏ @tjohnhos Apr 1
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      Replying to @johncarlosbaez @pitopos @BiCapitalize

      this is another one of those things where i can only remember it by remembering that it's the opposite way around to how i always think it should be

      2 replies 0 retweets 6 likes
    7. John Carlos Baez‏ @johncarlosbaez Apr 1
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      Replying to @tjohnhos @pitopos @BiCapitalize

      The direct limit is direct: if you see -->-->-->--> you just follow the damned arrows to find the direct limit. Inverse means you *don't* follow the arrows - you go the other way.

      1 reply 1 retweet 8 likes
      increpare‏ @increpare Apr 1
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      Replying to @johncarlosbaez @tjohnhos and

      I just want to share my favourite/only category theory mnemonic: the only way I can reliably remember which functors are left adjoints and which are right adjoints is that forgetful functors are right adjoints because of the EU legal phrase "right to be forgotten".

      7:47 PM - 1 Apr 2020
      • 1 Retweet
      • 7 Likes
      • Colas Ben Bruno Gavranović tensorphobia John Carlos Baez M L E P Brendan∧Murphy Jahwan Kim
      1 reply 1 retweet 7 likes
        1. New conversation
        2. Colas‏ @__colas Apr 2
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          Replying to @increpare @johncarlosbaez and

          I would like to start a thread: « how would you call a right adjoint and a left adjoint if you could decide a new name? »

          1 reply 0 retweets 2 likes
        3. Colas‏ @__colas Apr 2
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          Replying to @__colas @increpare and

          But I won’t

          0 replies 0 retweets 1 like
        4. End of conversation

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