Timeline for Dimension of commutant
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 4, 2021 at 7:53 | vote | accept | Peg Leg Jonathan | ||
| Jul 2, 2021 at 16:18 | comment | added | Onur Oktay | If an $n\times n$ matrix B commutes with every other $n\times n$ matrices, then B is a constant multiple of the identity matrix. // If a subgroup G of $n\times n$ matrices is irreducible (in the sense that if $\forall A\in G\hspace{2mm} AV\subseteq V $ then $V=\mathbb{C}^n$, where $V\neq\{0\}$ is a vector subspace of $\mathbb{C}^n$) then $BA=AB$ for every $A\in G$ implies that $A=cI$ for some $c\in\mathbb{C}$.. | |
| Jun 29, 2021 at 7:29 | answer | added | Mare | timeline score: 6 | |
| Jun 29, 2021 at 7:21 | history | asked | Peg Leg Jonathan | CC BY-SA 4.0 |