2025/03/21

Newest at the top

2025-03-21 18:26:44 +0100wootehfoot(~wootehfoo@user/wootehfoot) (Read error: Connection reset by peer)
2025-03-21 18:25:41 +0100L29Ah(~L29Ah@wikipedia/L29Ah) L29Ah
2025-03-21 18:24:29 +0100pavonia(~user@user/siracusa) (Quit: Bye!)
2025-03-21 18:21:55 +0100euleritian(~euleritia@dynamic-176-000-195-182.176.0.pool.telefonica.de)
2025-03-21 18:20:59 +0100euleritian(~euleritia@95.90.214.149) (Ping timeout: 252 seconds)
2025-03-21 18:17:25 +0100tzh(~tzh@c-76-115-131-146.hsd1.or.comcast.net)
2025-03-21 18:16:52 +0100euleritian(~euleritia@95.90.214.149)
2025-03-21 18:16:30 +0100euleritian(~euleritia@ip5f5ad695.dynamic.kabel-deutschland.de) (Ping timeout: 276 seconds)
2025-03-21 18:12:31 +0100chiselfu1echiselfuse
2025-03-21 18:11:36 +0100kuribas(~user@ip-188-118-57-242.reverse.destiny.be) (Remote host closed the connection)
2025-03-21 18:11:33 +0100euleritian(~euleritia@ip5f5ad695.dynamic.kabel-deutschland.de)
2025-03-21 18:11:14 +0100euleritian(~euleritia@dynamic-176-000-195-182.176.0.pool.telefonica.de) (Read error: Connection reset by peer)
2025-03-21 18:10:09 +0100econo_(uid147250@id-147250.tinside.irccloud.com)
2025-03-21 17:57:27 +0100j1n37-(~j1n37@user/j1n37) (Ping timeout: 268 seconds)
2025-03-21 17:56:59 +0100alfiee(~alfiee@user/alfiee) (Ping timeout: 260 seconds)
2025-03-21 17:56:34 +0100j1n37(~j1n37@user/j1n37) j1n37
2025-03-21 17:52:42 +0100alfiee(~alfiee@user/alfiee) alfiee
2025-03-21 17:50:19 +0100L29Ah(~L29Ah@wikipedia/L29Ah) (Read error: Connection reset by peer)
2025-03-21 17:49:50 +0100Square(~Square@user/square) (Ping timeout: 252 seconds)
2025-03-21 17:48:56 +0100vpan(~vpan@212.117.1.172) (Quit: Leaving.)
2025-03-21 17:45:23 +0100machinedgod(~machinedg@d108-173-18-100.abhsia.telus.net) machinedgod
2025-03-21 17:43:58 +0100chele(~chele@user/chele) (Remote host closed the connection)
2025-03-21 17:38:10 +0100 <EvanR> or homomorphism
2025-03-21 17:37:58 +0100 <EvanR> sounds like a luxury to be able to pick a "real" equality relation so you can call other mappings congruence
2025-03-21 17:36:42 +0100 <haskellbridge> <Bowuigi> That's usually called congruence I think
2025-03-21 17:36:30 +0100 <EvanR> (automatically preserves equality, perhaps without using normal forms)
2025-03-21 17:35:41 +0100 <EvanR> which we might take for granted and otherwise never had language for
2025-03-21 17:35:25 +0100 <EvanR> or you could talk about, however you did it, any function you manage to define automatically preserves (a) notion of equality
2025-03-21 17:34:03 +0100 <haskellbridge> <Bowuigi> Being able to ignore equality means that you can inspect the internal structure of something without that being in "normal form"
2025-03-21 17:33:58 +0100 <EvanR> yes we have functions between types that might not agree with one or more notions of equality we have in mind on the domains
2025-03-21 17:33:10 +0100 <haskellbridge> <Bowuigi> The concept of prefunction seems useful
2025-03-21 17:32:20 +0100 <EvanR> either because there's no Eq instance or because more serious issues
2025-03-21 17:31:49 +0100 <EvanR> also you could attempt to construe haskell's datatypes as presets because not all of them have a way to, at least decidably, know two values are equal
2025-03-21 17:30:05 +0100 <EvanR> it was the 60s, so maybe they were tripping AF
2025-03-21 17:29:23 +0100 <EvanR> something about foundations https://ncatlab.org/nlab/show/preset
2025-03-21 17:28:33 +0100lortabac(~lortabac@2a01:e0a:541:b8f0:55ab:e185:7f81:54a4) (Client Quit)
2025-03-21 17:27:37 +0100lortabac(~lortabac@2a01:e0a:541:b8f0:55ab:e185:7f81:54a4) lortabac
2025-03-21 17:27:09 +0100euleritian(~euleritia@dynamic-176-000-195-182.176.0.pool.telefonica.de)
2025-03-21 17:26:29 +0100acidjnk(~acidjnk@p200300d6e71c4f937555fc5a67c80b19.dip0.t-ipconnect.de) (Ping timeout: 248 seconds)
2025-03-21 17:24:58 +0100 <haskellbridge> <Bowuigi> Quotients become central in proofs, that's nice
2025-03-21 17:23:25 +0100notdabs(~Owner@2600:1700:69cf:9000:314f:c6fc:a776:72e4)
2025-03-21 17:23:06 +0100 <haskellbridge> <Bowuigi> How are those useful? I mean, order dependency is nice but do they make something more elegant?
2025-03-21 17:23:03 +0100notdabs(~Owner@2600:1700:69cf:9000:314f:c6fc:a776:72e4) (Remote host closed the connection)
2025-03-21 17:11:20 +0100alfiee(~alfiee@user/alfiee) (Ping timeout: 252 seconds)
2025-03-21 17:07:55 +0100Square(~Square@user/square) Square
2025-03-21 17:07:55 +0100euleritian(~euleritia@dynamic-176-006-136-021.176.6.pool.telefonica.de) (Ping timeout: 244 seconds)
2025-03-21 17:06:58 +0100alfiee(~alfiee@user/alfiee) alfiee
2025-03-21 17:05:51 +0100 <EvanR> so x doesn't equal x because equal doesn't exist
2025-03-21 17:04:57 +0100 <EvanR> (yet)
2025-03-21 17:04:31 +0100 <EvanR> I actually veered off, the presets are "sets" without equality among the elements