Automorphisms of some finite magmas with an order strictly less than the number N(N+1) and a generating set of N elements

Litavrin, Andrey Viktorovich

doi:10.26456/vtpmk533

Herald of Tver State University. Ser. Appl. Math.

2019

DOI: 10.26456/vtpmk533

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Automorphisms of some finite magmas with an order strictly less than the number N(N+1) and a generating set of N elements

Andrey Viktorovich Litavrin¹

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2022

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Endomorphisms and anti-endomorphisms of some finite groupoids

Litavrin

2022

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In this paper, we study anti-endomorphisms of some finite groupoids. Previously, special groupoids S(k,q) of order k(1+k) with a generating set of k elements were introduced. Previously, the element-by-element description of the monoid of all endomorphisms (in particular, automorphisms) of a given groupoid was studied. It was shown that every finite monoid is isomorphically embeddable in the monoid of all endomorphisms of a suitable groupoid S(k,q). In recent article, we give an element-by-element description for the set of all anti-endomorphisms of the groupoid S(k,q). We establish that, depending on the groupoid S(k,q), the set of all its anti-endomorphisms may be closed or not closed under the composition of mappings. For an element-by-element description of anti-endomorphisms, we study the action of an arbitrary anti-endomorphism on generating elements of a groupoid. With this approach, the anti-endomorphism will fall into one of three classes. Anti-endomorphisms from the two classes obtained will be endomorphisms of given groupoid. The remaining class of anti-endomorphisms, depending on the particular groupoid S(k,q), may either consist or not consist of endomorphisms. In this paper, we study endomorphisms of some finite groupoids G whose order satisfies some inequality. We construct some endomorphisms of such groupoids and show that every finite monoid is isomorphically embedded in the monoid of all endomorphisms of a suitable groupoid G. To prove this result, we essentially use a generalization of Cayley's theorem to the case of monoids (semigroups with identity).

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Endomorphisms and anti-endomorphisms of some finite groupoids

Litavrin

2022

Zhurnal SVMO

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Automorphisms of some finite magmas with an order strictly less than the number N(N+1) and a generating set of N elements

Cited by 1 publication

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Endomorphisms and anti-endomorphisms of some finite groupoids

Endomorphisms and anti-endomorphisms of some finite groupoids

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