Results 91 to 100 of about 760 (210)
Automorphisms and range families of transformation semigroups [PDF]
, 1984 The problem of describing all automorphisms of a given semigroup of transformations of a set X has interested a number of mathematicians in the past fifty years. J. Schreier showed that all automorphisms of the full transformation semigroup T“ are inner,
Levi, Inessa
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Open MathematicsFor n≥4n\ge 4, let OPDn{{\mathcal{OPD}}}_{n} be the orientation-preserving and order-decreasing transformation semigroup on the finite chain Xn ...
Toker Kemal
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Two-Sided Zero-Divisor Graphs of Order-Preserving and A-Decreasing Finite Transformation Semigroups
AxiomsLet On(A) be the order-preserving and A-decreasing finite transformation semigroup on Xn = {1, 2, …, n}. It is known that On(A) has zero element if and only if 1 ∈ A. In this paper, we investigate zero-divisor graphs of On(A) where 1 ∈ A and n ≥ 4. First,
Kemal Toker, Muhammet Uysal
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Counting transformation monoids and semigroups
, 2023 We show how to enumerate different types of transformation monoids and semigroups on finite sets using the NextClosure algorithm by Ganter. This leads to an exension of the sequence A343140 in The On-line Encyclopedia of Integer Sequences (https://oeis ...
Behrisch, Mike; orcid:
core
On new symbolic key exchange protocols and cryptosystems based on a hidden tame homomorphism
Доповiдi Нацiональної академiї наук УкраїниMultivariate cryptosystems are divided into public rules, for which tools of encryption are open for users and systems of the El Gamal type, for which the encryption function is not given in public, and, for its generation, the opponent has to solve a ...
V.A. Ustimenko
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Semigroup models for biochemical reaction networks. [PDF]
J Math Biol, 2023 Loutchko D.
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An algebraic characterization of self-generating chemical reaction networks using semigroup models. [PDF]
J Math Biol, 2023 Loutchko D.
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Graphs and finite transformation semigroups
Discrete Mathematics, 1973 Given a finite set X and a semigroup S of transformations of X, we study the orbitoids of S on X and on X^2 and, assuming S transitive, those of the statbilizer in S of an element @a @? X. The action of S as a semigroup of endomorphisms of some relevant graphs (having X as vertex set) is also considered.
openaire +1 more source
Fractional transformations of generalised functions
, 2009 A distributional theory of fractional transformations is developed. A constructive approach, based on the eigenfunction expansion method pioneered by A. H.
Lamb, Wilson +5 more
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Every group is a maximal subgroup of the free idempotent generated semigroup over a band
, 2013 Given an arbitrary group G we construct a semigroup of idempotents (band) BG with the property that the free idempotent generated semigroup over BG has a maximal subgroup isomorphic to G. If G is finitely presented then BG is finite. This answers several
Ruskuc, Nik +3 more
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