Timeline for A natural refinement of the $A_n$ arrangement is to consider all $2^n-1$ hyperplanes given by the sums of the coordinate functions. Have you seen this arrangement? Is it completely intractable?
Current License: CC BY-SA 3.0
11 events
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| Jun 15, 2020 at 7:27 | history | edited | CommunityBot |
Commonmark migration
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| Apr 13, 2017 at 12:58 | history | edited | CommunityBot |
replaced http://mathoverflow.net/ with https://mathoverflow.net/
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| Jun 21, 2013 at 12:19 | vote | accept | Paul Johnson | ||
| Jun 19, 2013 at 22:06 | answer | added | Erik Aas | timeline score: 8 | |
| Apr 27, 2011 at 19:41 | comment | added | Paul Johnson | Just commenting to thank Richard -- this is one kind of thing I wanted to hear: that people had put some real thought into it and not gotten anything interesting. I wasn't up-voting that you didn't get anywhere. | |
| Apr 23, 2011 at 21:56 | comment | added | Paul Johnson | @Theo: Also, you are half responsible for the long title: somewhere you mentioned that a title can be about a "tweet and a half" long, and that was an odd enough description that it stuck in my head. Good work. | |
| Apr 23, 2011 at 21:48 | comment | added | Paul Johnson | Think I fixed the TeX. And I was a bit torn about it not being specific enough myself, but it was never going to get asked if I kept worrying about it. Next time will be better. | |
| Apr 23, 2011 at 21:43 | history | edited | Paul Johnson | CC BY-SA 3.0 |
fixed tex and a typo; added 2 characters in body
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| Apr 23, 2011 at 21:04 | comment | added | Theo Johnson-Freyd | -1 for not having a more specific question, but +2 for lots of details and interesting discussion and good title. Also, I think there's something funny with the TeX between "However, one can consider the triangular ..." and "These hyperplanes are no longer ...". | |
| Apr 23, 2011 at 19:09 | comment | added | Richard Stanley | Several of my students and I have thought about the characteristic polynomial and number of regions of this arrangement over the years, but we never came up with anything interesting. | |
| Apr 23, 2011 at 18:36 | history | asked | Paul Johnson | CC BY-SA 3.0 |