Timeline for If $A,B$ are upper triangular matrices such that $AX=XA\implies BX=XB$ for upper triangular $X$, is $B$ a polynomial in $A$?
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 10, 2018 at 2:14 | vote | accept | Spot | ||
| Jul 10, 2018 at 2:10 | comment | added | Francois Ziegler | Bravo! $\,\!\,$ | |
| Jul 10, 2018 at 1:50 | history | answered | David E Speyer | CC BY-SA 4.0 |