Timeline for How to distinguish projective involutions?
Current License: CC BY-SA 3.0
3 events
when toggle format | what | by | license | comment | |
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Nov 14, 2012 at 16:31 | comment | added | Abel Stolz | Yes, I know that. Unfortunately I want to exclude exactly such characterizations... | |
Nov 14, 2012 at 16:15 | comment | added | Will Sawin | For $PGL_n$, an involution is the first kind if and only if it fixes some point in $\mathbb P^{n-1}$ in the natural action. This is because it is the first kind if and only if it has a $K$-rational eigenvector. | |
Nov 14, 2012 at 16:00 | history | asked | Abel Stolz | CC BY-SA 3.0 |