D-semigroups and constellations
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DOI: 10.1007/s00233-017-9851-z
Abstract: In a result generalising the Ehresmann–Schein–Nambooripad Theorem relating inverse semigroups to inductive groupoids, Lawson has shown that Ehresmann semigroups correspond to certain types of ordered (small) categories he calls Ehresmann categories. An important special case… read more here.
Keywords: ehresmann semigroups; restriction; one sided; semigroups constellations ... See more keywords
On algebras of P-Ehresmann semigroups and their associate partial semigroups
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DOI: 10.1007/s00233-017-9903-4
Abstract: P-Ehresmann semigroups are introduced by Jones as a common generalization of Ehresmann semigroups and regular $$*$$∗-semigroups. Ehresmann semigroups and their semigroup algebras are investigated by many authors in literature. In particular, Stein shows that under… read more here.
Keywords: ehresmann semigroups; semigroup algebra; ehresmann; associate partial ... See more keywords