Timeline for Tweetable Mathematics
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 16, 2019 at 14:12 | comment | added | WhatsUp | Except when the dimension is equal to zero in the coefficient ring (e.g. $M_{2 \times 2}(\mathbb{F}_2)$). | |
| Apr 16, 2019 at 13:04 | comment | added | David Handelman | $AB - BA= I$ not solvable in Banach algebras. Pf: Spectra of AB and BA. | |
| May 15, 2017 at 0:04 | comment | added | Duchamp Gérard H. E. | Except void matrices ($n=0$ :) | |
| S May 14, 2017 at 23:35 | history | answered | T. Amdeberhan | CC BY-SA 3.0 | |
| S May 14, 2017 at 23:35 | history | made wiki | Post Made Community Wiki by T. Amdeberhan |