Timeline for Is there any monoid in which the product of two non-invertible elements could be invertible?
Current License: CC BY-SA 3.0
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| Sep 19, 2013 at 19:11 | comment | added | Amir Asghari | Dear Mark. Many thanks for your answer. I "accepted" Todd's since as a "general" reader I learned more from that. | |
| Sep 17, 2013 at 16:15 | history | answered | user6976 | CC BY-SA 3.0 |