Timeline for Number of valid topologies on a finite set of n elements
Current License: CC BY-SA 2.5
15 events
| when toggle format | what | by | license | comment | |
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| Mar 3, 2020 at 15:22 | answer | added | SARTHAK GUPTA | timeline score: 3 | |
| Oct 2, 2018 at 5:52 | comment | added | Our | See also this paper, arxiv.org/pdf/1503.08359.pdf | |
| Feb 10, 2010 at 5:46 | history | made wiki | Post Made Community Wiki by Harry Gindi | ||
| Dec 15, 2009 at 22:59 | vote | accept | Harry Gindi | ||
| Dec 15, 2009 at 15:26 | answer | added | Jose Brox | timeline score: 26 | |
| Dec 15, 2009 at 15:16 | answer | added | Qiaochu Yuan | timeline score: 18 | |
| Dec 15, 2009 at 11:34 | answer | added | Harrison Brown | timeline score: 39 | |
| Dec 15, 2009 at 11:18 | answer | added | darij grinberg | timeline score: 8 | |
| Dec 15, 2009 at 11:01 | answer | added | John D. Cook | timeline score: 0 | |
| Dec 15, 2009 at 10:25 | history | edited | Harry Gindi |
re-tagged
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| Dec 15, 2009 at 9:44 | comment | added | Jonas Meyer | It appears to be open (so you should probably add that tag), but I too am curious about why it appears to be intractable. | |
| Dec 15, 2009 at 9:19 | comment | added | Harry Gindi | Well, thanks for the reference. Also, by a valid topology, I mean subsets of the power set that define a topology. I guess it was redundant. | |
| Dec 15, 2009 at 9:16 | comment | added | Ryan Budney | Presumably a subset of the power set which is not closed under either union or intersection. | |
| Dec 15, 2009 at 9:15 | comment | added | Mariano Suárez-Álvarez | What do you mean by 'valid'? There are lots of references at research.att.com/~njas/sequences/A000798, and in the related sequences. | |
| Dec 15, 2009 at 9:00 | history | asked | Harry Gindi | CC BY-SA 2.5 |