Timeline for Matrix equation $P^TAP=A$
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 24, 2021 at 14:32 | comment | added | Ali Taghavi | Yes I see. On the other hand the Lie algebra of the other group is $V^T A+AV=0$ | |
| Jun 24, 2021 at 12:08 | comment | added | Dima Pasechnik | Centraliser of $A$, i.e. $\{X \in GL_m\mid AX=XA\}$ is a different beast - it depends on eigenvalues of $A$. It's quite small if they are all different, and the whole $GL_m$ is they are all the same. | |
| Jun 24, 2021 at 8:37 | vote | accept | user46230 | ||
| Jun 23, 2021 at 22:13 | comment | added | Ali Taghavi | It would be interesting to compare the two lie groups: centralizer of A and the other one mentioned in the question. | |
| Jun 23, 2021 at 21:51 | history | answered | Dima Pasechnik | CC BY-SA 4.0 |