Timeline for Whenever I read "centraliser of maximal split torus", I think of...
Current License: CC BY-SA 2.5
5 events
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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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| Mar 30, 2010 at 16:09 | comment | added | LSpice | Brian, you're right. I'm just so used to working from the centraliser-of-a-torus perspective that I forgot that it wasn't the original definition! | |
| Mar 30, 2010 at 15:55 | comment | added | BCnrd | Loren, for your "trivial" observation, is it really "essentially the definition"? I thought the definition of "quasi-split" is existence of a Borel subgroup over the ground field k, and then one has to make an argument using the relative structure theory to identify such centralizers with Levi subgroups of minimal k-parabolic subgroups (so the minimal ones are Borels, or equivalently solvable, if and only if these centralizers are tori). | |
| Mar 30, 2010 at 15:31 | history | edited | LSpice | CC BY-SA 2.5 |
Minor wording change.
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| Mar 30, 2010 at 15:25 | history | answered | LSpice | CC BY-SA 2.5 |