Timeline for Invertible elements in monoid rings of unital monoids without non-trivial invertible elements
Current License: CC BY-SA 2.5
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| Oct 23, 2010 at 12:17 | comment | added | Andreas Thom | I see. This also implies that every unit in such a monoid ring contains 1 in its support. That is were I went wrong. I thought existence of non-trivial left-invertible elements would be a consequence of the existence of units in the monoid ring, but that is wrong. I hope you allow me to change the question slightly. | |
| Oct 23, 2010 at 11:52 | history | answered | Torsten Ekedahl | CC BY-SA 2.5 |