Results 51 to 60 of about 259 (129)
Enumerating Problems Concerning Endomorphisms of Double Vertex Wheel Graphs
Journal of Mathematics, Volume 2024, Issue 1, 2024.We can define six classes of endomorphisms on a graph, and they always form a chain based on set inclusion. The concepts of endomorphism type and endomorphism spectrum were introduced by Böttcher and Knauer in 1992. They provided a systematic and organized approach to study endomorphisms of graphs.
Yu Li, Hailong Hou, Kaidi Xu, Huadong Su
wiley +1 more source
Some Algebraic Classification of Semiregular Hypermodules in Connection to the Radical
Journal of Mathematics, Volume 2024, Issue 1, 2024.We call a Krasner right S‐hypermodule A regular if each cyclic subhypermodule of A is a direct summand of A, and we also call A semiregular if every finitely generated subhypermodule of A lies above a direct summand of A. In this study, some properties of such hypermodules are achieved.
Yıldız Aydın +2 more
wiley +1 more source
Rank properties of the semigroup of endomorphisms over Brandt semigroup
Semigroup Forum, 2017 Howie and Ribeiro \cite{a.Howie99,a.Howie00} introduced various ranks, viz. small rank, lower rank, intermediate rank, upper rank and the large rank of a finite semigroup. In this note, we investigate all these ranks of the semigroup of endomorphisms over Brandt semigroup.
openaire +3 more sources
On determinability of idempotent medial commutative quasigroups by their endomorphisms semigroups
, 2020 . We extend the result of P. Puusemp (Idempotents of the endomorphism semigroups of groups. Acta Comment. Univ. Tartuensis, 1975, 366, 76-104) about determinability of finite Abelian groups by their endomorphism semigroups to finite idempotent medial ...
Peeter Puusemp, Alar Leibak
core
, 2012 In this thesis we consider in detail the following two fundamental problems for semigroup presentations: 1. Given a semigroup find a presentation defining it. 2. Given a presentation describe the semigroup defined by it.
Ruškuc, Nik
core
On semidirect product of semigroups
, 1989 Let X be a subset of a semigroup S. We denote by E(X) the set of idempotent elements Of X.An element a of a semigroup S is called E-inverse if there exists $x ∈ E(S)$ such that $ax ∈ E(S)$. We note that the definition is not one-sided.
Catino, Francesco +1 more
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Generation and presentations of semigroup constructions : Bruck-Reilly extensions and P-semigroups [PDF]
, 2021 In this thesis we study problems regarding finite presentability of Bruck-Reilly extensions, finite generation of the underlying monoids, and finite generation of P-unitary inverse semigroups.
Carvalho, Catarina A. S.
core
Automorphisms of the endomorphism semigroup of a free abelian diband
, 2018 We determine all isomorphisms between the endomorphism semigroups of free abelian dibands and prove that all automorphisms of the endomorphism semigroup of a free abelian diband are inner.The publication is based on the research provided by the grant ...
Zhuchok, Y.V.
core +1 more source
On the determinability of free trioids by semigroups of endomorphisms
, 2015 Доказано, что полугруппы эндоморфизмов двух свободных триоидов изоморфны тогда и только тогда, когда соответствующие свободные триоиды изоморфны.Доведено, що напiвгрупи ендоморфiзмiв двох вiльних трiоїдiв iзоморфнi тодi й лише тодi, коли вiдповiднi ...
Жучок, Ю.В.
core +2 more sources
On ternary semigroups of homomorphisms of ordered sets [PDF]
, 1994 summary:The paper deals with the characterization of ordered sets by means of ternary semigroups of homomorphisms of ordered ...
Chronowski, Antoni, Antoni Chronowski
core