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
5 events
| when toggle format | what | by | license | comment | |
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| Apr 25, 2011 at 0:01 | vote | accept | user8974 | ||
| Apr 11, 2013 at 18:54 | |||||
| Apr 24, 2011 at 23:59 | vote | accept | user8974 | ||
| Apr 24, 2011 at 23:59 | |||||
| Apr 21, 2011 at 8:10 | history | edited | Bob Yuncken | CC BY-SA 3.0 |
added 3 characters in body
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| Apr 21, 2011 at 7:45 | comment | added | Kevin Buzzard | In more down-to-earth terms, take a maximal parabolic subgroup of $SL(3)$. It acts naturally on a 3-dimensional vector space. It either stabilises a line but no plane, or a plane but no line, depending on which one you chose. Its opposite will do the opposite! So these parabolics cannot be conjugate in $GL(3)$. | |
| Apr 21, 2011 at 3:37 | history | answered | Bob Yuncken | CC BY-SA 3.0 |