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2026-06-10 00:05:41 +0000merijn(~merijn@host-cl.cgnat-g.v4.dfn.nl) merijn
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2026-06-10 02:11:19 +0000fun-safe-math(~fun-safe-@97-120-35-225.ptld.qwest.net) fun-safe-math
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2026-06-10 02:24:48 +0000lisbeths(uid135845@id-135845.lymington.irccloud.com) lisbeths
2026-06-10 02:28:29 +0000 <monochrom> Relativity uses sqrt(dx^2 + dy^2 + dz^2 - c*dt^2) (under the constraint that you don't go faster than c so the sqrt is real). Sometimes you can think of the time axis as like imaginary numbers.
2026-06-10 02:28:30 +0000merijn(~merijn@host-cl.cgnat-g.v4.dfn.nl) (Ping timeout: 245 seconds)
2026-06-10 02:29:39 +0000 <monochrom> or maybe it's sqrt(c*dt^2 - (dx^2 + dy^2 + dz^2)), I forgot which.
2026-06-10 02:30:24 +0000Googulator6(~Googulato@94-21-172-222.pool.digikabel.hu) (Quit: Client closed)
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2026-06-10 02:32:46 +0000bitdex(~bitdex@gateway/tor-sasl/bitdex) (Ping timeout: 245 seconds)
2026-06-10 02:33:58 +0000bitdex(~bitdex@gateway/tor-sasl/bitdex) bitdex
2026-06-10 02:34:00 +0000ystael(~ystael@user/ystael) (Ping timeout: 244 seconds)
2026-06-10 02:40:41 +0000merijn(~merijn@host-cl.cgnat-g.v4.dfn.nl) merijn
2026-06-10 02:42:07 +0000 <EvanR> it's ds^2 = -dt^2 + dx^2 + dy^2 + dz^2, where the right hand side may easily end up negative for e.g. a particle just sitting there
2026-06-10 02:42:30 +0000 <EvanR> so you need to be careful when attempting to take the square root (ds^2 is effectively just notation)
2026-06-10 02:47:10 +0000 <EvanR> given the above proper time is dtau = sqrt(-ds^2)
2026-06-10 02:47:22 +0000merijn(~merijn@host-cl.cgnat-g.v4.dfn.nl) (Ping timeout: 259 seconds)
2026-06-10 02:48:31 +0000 <EvanR> and if it's a spacelike curve, d properlength = sqrt(ds^2)
2026-06-10 02:58:48 +0000merijn(~merijn@62.45.136.136) merijn
2026-06-10 03:00:13 +0000Axman636(~Axman6@user/axman6) Axman6
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2026-06-10 03:12:06 +0000eron(~eron@179.118.254.196) lidenbrock
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2026-06-10 03:23:52 +0000spew(~spew@user/spew) spew
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2026-06-10 03:46:33 +0000dutchie(~dutchie@user/dutchie) dutchie
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