Timeline for Automorphisms of locally finite countable posets-2
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 29, 2011 at 17:46 | history | edited | user16974 | CC BY-SA 3.0 |
added 28 characters in body
|
| Sep 29, 2011 at 17:32 | history | edited | user16974 | CC BY-SA 3.0 |
added 96 characters in body; added 12 characters in body
|
| Sep 29, 2011 at 15:18 | answer | added | David | timeline score: -2 | |
| Sep 29, 2011 at 13:28 | comment | added | user16974 | Yes that is true, but I am not very well aware of poset terminology. | |
| Sep 29, 2011 at 12:46 | vote | accept | CommunityBot | ||
| Sep 29, 2011 at 9:41 | answer | added | Colin Reid | timeline score: 2 | |
| Sep 29, 2011 at 9:26 | history | edited | Colin Reid |
edited tags
|
|
| Sep 29, 2011 at 9:25 | comment | added | Emil Jeřábek | I still do not quite understand it. Every singleton is an antichain, so is condition 1 simply saying that every maximal chain is upwards and downwards cofinal in the poset? Since the poset is countable, isn’t this equivalent to the poset being upwards and downwards directed? | |
| Sep 29, 2011 at 6:28 | history | edited | user16974 | CC BY-SA 3.0 |
added 112 characters in body; edited title
|
| Sep 29, 2011 at 4:50 | comment | added | user16974 | Joel: I edited the question. | |
| Sep 29, 2011 at 4:50 | history | edited | user16974 | CC BY-SA 3.0 |
added 9 characters in body
|
| Sep 29, 2011 at 0:46 | comment | added | Joel David Hamkins | The quantifiers in your hypothesis are not clear. Do you mean to assume that your partial order, in addition to being locally finite, countable and connected, has the covering property for every pair (A,C) of a maximal chain and maximal antichain? And when you say A is covered by Past(x) and Future(x), do you mean that the family of pasts alone covers A and also the family of futures alone covers A? Or do you mean that one might possibly need both futures and pasts from C to cover A? | |
| Sep 28, 2011 at 19:21 | comment | added | user16974 | It is related to a quantization procedure on a family of isomorphic causal sets, which are locally finite countable connected posets. | |
| Sep 28, 2011 at 18:53 | comment | added | André Henriques | I dont understand the title of the question: what are we quantizing? | |
| Sep 28, 2011 at 18:22 | history | asked | user16974 | CC BY-SA 3.0 |