Timeline for What is a Kelley ring?
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| when toggle format | what | by | license | comment | |
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| Feb 20, 2015 at 9:59 | comment | added | Ibrahim Tencer | Actually it does work out: note that $0^2x = (0^2 + 0^2)x = 0^2$ for all $x$. So if $0 \cdot 0 \ne 0$, take any nonzero $x$ as above. $0^2 + 0^2$ is also nonzero by hypothesis, so we can cancel $x$ to get $0^2 = 0^2 + 0^2$ so $0^2 = 0$ and we have a ring with identity. | |
| Feb 20, 2015 at 0:59 | history | answered | Gerald Edgar | CC BY-SA 3.0 |