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- W2087980212 abstract "1. An identity for R(S) and the main theorem. Let S be an inverse semigroup, i.e. a regular semigroup in which idempotents commute. Let E be the set of idempotents in S. Then E is a commutative idempotent subsemigroup of S and each principal left (right) ideal of S has a unique idempotent generator [1, Theorem 1.17, p. 28]. Then R(S) has an identity if R(E) has one. If Z denotes the ring of integers and Z(E) has an identity, then R(E) has an identity. Note that E has a zero if I El is finite." @default.
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- W2087980212 title "Self-injective semigroup rings for finite inverse semigroups" @default.
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