Skip to main content
7 events
when toggle format what by license comment
Nov 18, 2010 at 17:33 vote accept unknown
Nov 18, 2010 at 5:56 comment added Torsten Ekedahl You have to assume that $P$ is saturated, cancellative and with the group completion torsion free in order to be able to recover it from the cone. "Saturated" means that if $p$ belongs to the group completion and $np\in P$ for some $n>0$ then $p\in P$.
Nov 18, 2010 at 5:23 answer added Dustin Cartwright timeline score: 4
Nov 18, 2010 at 5:05 comment added Dave Anderson Just to clarify about generators: you don't want to use the same $r$ for the number of generators of $P$ and the rank of $N$. For example, take the monoid generated by $2$ and $3$ inside $M={\Bbb Z}$. Then $N={\Bbb Z}$ also, but you need two generators for $P$.
Nov 18, 2010 at 4:56 answer added Dave Anderson timeline score: 2
Nov 18, 2010 at 3:43 answer added Eric Zaslow timeline score: 2
Nov 17, 2010 at 22:29 history asked unknown CC BY-SA 2.5