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math.RA2024
The maximal subsemigroups of the ideals on a monoid of partial injections
Apatsara Sareeto, Jörg Koppitz
In the present paper, a submonoid of the well studied monoid of all order-preserving partial injections on an -element chain is studied. The set of all par…
math.RA2023
A presentation for a submonoid of the symmetric inverse monoid
Apatsara Sareeto, Jörg Koppitz
A fully invarient congruence relations on the free algebra on a given type induces a variety of the given type. In contrast, a congruence relation of the free algebra provides alge…