Timeline for Lens-shaped vs globally hyperbolic
Current License: CC BY-SA 3.0
4 events
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| Nov 1, 2014 at 0:06 | comment | added | Igor Khavkine | I did add the requirement that the level sets of the time function have to all be Cauchy surfaces, but I see that it was easy to miss. I've improved the wording now. Thanks for bringing it to my attention! | |
| Nov 1, 2014 at 0:04 | history | edited | Igor Khavkine | CC BY-SA 3.0 |
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| Oct 31, 2014 at 10:53 | comment | added | Willie Wong | Igor, there seems to be some confusion about the sentence "property of being lens-shaped is equivalent to the existence of a smooth time function". This is certainly not true for $(-1,1)\times(-1,1)\subset \mathbb{R}^{1,1}$, and I think you of course have some additional conditions in mind when you wrote that. Anyway, someone has asked about it on Math.SE so it'd be great if you can drop by and clarify. | |
| Nov 22, 2011 at 12:33 | history | answered | Igor Khavkine | CC BY-SA 3.0 |