Timeline for Can every parabolic subgroup be conjugated to its opposite by an element of the Weyl group?
Current License: CC BY-SA 3.0
12 events
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| Jan 30, 2015 at 12:25 | history | edited | Vít Tuček | CC BY-SA 3.0 |
title & tag change as suggested in the comments
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| S Apr 11, 2013 at 18:54 | vote | accept | user8974 | ||
| Sep 2, 2011 at 14:20 | comment | added | Johannes Hahn | Is "a tweet" now really an official measurement of text-lengths? | |
| Sep 2, 2011 at 14:07 | answer | added | Dahni | timeline score: -6 | |
| Apr 25, 2011 at 0:01 | vote | accept | user8974 | ||
| S Apr 11, 2013 at 18:54 | |||||
| Apr 24, 2011 at 23:59 | vote | accept | user8974 | ||
| Apr 25, 2011 at 0:01 | |||||
| Apr 24, 2011 at 23:59 | vote | accept | user8974 | ||
| Apr 24, 2011 at 23:59 | |||||
| Apr 21, 2011 at 13:30 | comment | added | Jim Humphreys |
Adding to Theo's request, a tag algebraic-groups would be more appropriate here. The question (and negative answer) work uniformly for semisimple algebraic groups over arbitrary algebraically closed fields, by the way. Also, the terminology is out of focus. When a Borel subgroup $B$ is fixed and the rank is $r$, there are $2^r$ nonconjugate standard parabolics containing $B$. While $B$ itself is minimal in this collection, it's usual to call those with a single negative root "minimal"; similarly "maximal" includes "proper" in this context.
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| Apr 21, 2011 at 3:37 | answer | added | Bob Yuncken | timeline score: 5 | |
| Apr 21, 2011 at 3:35 | answer | added | mathreader | timeline score: 8 | |
| Apr 21, 2011 at 2:49 | comment | added | Theo Johnson-Freyd | Please include a short gloss of your question in the title, so that folks reading only the front page know more about your question than merely the vague topic. "Can every parabolic subgroup be conjugated to its opposite by an element of the Weyl group?" is certainly short enough to fit (titles here can be about a tweet and a half in length). Otherwise, the question is a good one --- but if you feel like writing more, it's always nice to know why you're interested in this question, what you've already figured out, etc. | |
| Apr 20, 2011 at 23:13 | history | asked | user8974 | CC BY-SA 3.0 |