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math.GR2021
Ordered Ehresmann semigroups and categories
Tim Stokes
Ehresmann semigroups may be viewed as biunary semigroups equipped with domain and range operations satisfying some equational laws. Motivated by some of the main examples, we here…
math.GR2021★ 5 cited
Left restriction monoids from left -completions
Tim Stokes
Given a monoid with any non-empty subset of its idempotents, we present a novel one-sided version of idempotent completion we call left -completion. In general, the cons…