Timeline for What is an example of a ring with two (or more) multiplicative right-identities?
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| Apr 25, 2020 at 1:37 | comment | added | LSpice | @RichardStanley, could it be a difference of terminology (like which ones are right cosets, where one has to decide whether the representative or the group action is on the right)? I'd call a right identity of $R$ an element $i$ that satisfies $x i = x$ for all $x \in R$, in which sense it seems that $a$ and $b$ are both right identities here. | |
| May 1, 2011 at 16:15 | history | edited | Qiaochu Yuan | CC BY-SA 3.0 |
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| May 1, 2011 at 15:38 | comment | added | Richard Stanley | Not that it matters, but doesn't your example have two left identities, not two right identities? | |
| May 1, 2011 at 15:35 | history | edited | Qiaochu Yuan | CC BY-SA 3.0 |
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| May 1, 2011 at 14:32 | history | answered | Qiaochu Yuan | CC BY-SA 3.0 |