6:42 AM
Aug 21, 2013 at 6:59, by quid
The first sentence of a new room should be good, in particular if the room is about editing. Likely, I failed.
1 hour later…
7:46 AM
new-tag Two new tags ordered-rings and ordered-semirings. The questions where those two tags were created has no top-level tags.
1
Each semi-ring $R$ comes equipped with a canonical preorder $r\leq r^\prime \Leftrightarrow \exists w: r + w = r^\prime$. If $R$ is a ring this order collapses. However, if $R$ is the positive part of a ring, it should usually be a lattice. More precisely, the only reason it could fail is if, in ...
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MO editors' lounge
Talk related to editing, tagging and related matters for the s...