Timeline for Are all null curves of a Lorentzian metric extrema?
Current License: CC BY-SA 3.0
11 events
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| Mar 10, 2013 at 12:16 | vote | accept | CommunityBot | ||
| Mar 9, 2013 at 14:49 | answer | added | Robert Bryant | timeline score: 6 | |
| Mar 8, 2013 at 17:43 | comment | added | user7807 | OK, thanks! I don't know, I'm 100% far from an expert on this, but it came up in a discussion today | |
| Mar 8, 2013 at 17:42 | history | edited | user7807 | CC BY-SA 3.0 |
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| Mar 8, 2013 at 17:41 | comment | added | José Figueroa-O'Farrill | Clearly not every null curve is a null geodesic. | |
| Mar 8, 2013 at 17:41 | comment | added | José Figueroa-O'Farrill | A null geodesic is a geodesic whose velocity is lightlike. Not just any curve with lightlike velocity is a null geodesic. | |
| Mar 8, 2013 at 17:40 | comment | added | user7807 | I guess that's technically only a null curve. I guess I should re-phrase my question as to whether any null curve is a null geodesic... | |
| Mar 8, 2013 at 17:38 | comment | added | user7807 | As far as I understand a "null geodesic" is a curve for which $\| \dot{\gamma}(s) \|_g = 0$. Is that not the case? | |
| Mar 8, 2013 at 17:36 | history | edited | user7807 |
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| Mar 8, 2013 at 17:34 | comment | added | Anton Petrunin | You should read the definition of null geodesic before asking. | |
| Mar 8, 2013 at 17:20 | history | asked | user7807 | CC BY-SA 3.0 |