Timeline for Why doesn't the number of space dimensions equal the number of time dimensions?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| Jun 20 at 17:08 | history | protected | CommunityBot | ||
| May 4, 2015 at 19:59 | answer | added | Peter Wills | timeline score: 2 | |
| Aug 28, 2014 at 3:28 | vote | accept | zeta | ||
| Aug 7, 2014 at 20:20 | comment | added | user12262 |
@Harold: "You could measure time in metres [...] just multiply by c." -- More congruously: Either, referring to SI units, you can express a number of seconds` as the same number of metres, just multiplied by $c/299458792$. Or, referring to quantites: ping duration between two ends (at rest to each other), times $c/2$, is called distance between these ends. On the OP question: If (at least) one identifiable participant took part in several events, we'd call these events pairwise time-like related, and not space-like related. (A basic distinction; some might call it "asymmetry".)
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| Aug 7, 2014 at 10:29 | answer | added | John Rennie | timeline score: 8 | |
| Aug 7, 2014 at 2:43 | comment | added | Johannes | @Harold - time and space are (locally) different at the level of the metric tensor. | |
| Aug 7, 2014 at 2:32 | comment | added | Arthur Suvorov | Even in the absence of symmetry arguments people have definitely looked at this kind of thing. The resulting space-time with more than one temporal dimension is called 'ultrahyperbolic'. A google or arXiv search on ultrahyperbolic space-time should be a good starting point | |
| Aug 7, 2014 at 1:50 | comment | added | SuperCiocia | Basically, yes. | |
| Aug 7, 2014 at 1:27 | comment | added | SuperCiocia | Time and space are not different in the framework of special and general relativity (and therefore should not be different in quantum gravity). You could measure time in metres if you want to, just multiply by $c$. There is no symmetry here. | |
| Aug 7, 2014 at 1:07 | comment | added | ACuriousMind♦ | And which symmetry would it be that lets you suspect multiple time dimensions? | |
| Aug 7, 2014 at 1:06 | comment | added | Qmechanic♦ | Related: physics.stackexchange.com/q/10651/2451 . Related (since there are at least 3 spatial dimensions): physics.stackexchange.com/q/43322/2451 and links therein. | |
| Aug 7, 2014 at 1:00 | history | edited | Qmechanic♦ |
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| Aug 7, 2014 at 0:52 | history | asked | zeta | CC BY-SA 3.0 |