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 19:16 | comment | added | Amir Asghari | Dear Vahid, many thanks for your answer. I am sure it doesn't matter that much, but since your answer was essentially the same as Todd's, I accepted his answer. He was first :) | |
| Sep 17, 2013 at 17:43 | comment | added | user23860 | Oops, I just noticed Todd's answer uses the same idea! | |
| Sep 17, 2013 at 17:38 | history | answered | user23860 | CC BY-SA 3.0 |