Results 31 to 40 of about 4,881 (233)

Algebraic and combinatorial structures on Baxter permutations [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2011
We give a new construction of a Hopf subalgebra of the Hopf algebra of Free quasi-symmetric functions whose bases are indexed by objects belonging to the Baxter combinatorial family (\emphi.e.
Samuele Giraudo
doaj   +1 more source

Monoidal Supercategories [PDF]

open access: yesCommunications in Mathematical Physics, 2017
42 pages, sign error in Definition 1.16 ...
Brundan, Jonathan, Ellis, Alexander P.
openaire   +2 more sources

Monoid Properties as Invariants of Toposes of Monoid Actions [PDF]

open access: yesApplied Categorical Structures, 2020
AbstractWe systematically investigate, for a monoidM, how topos-theoretic properties of$${{\,\mathrm{\mathbf {PSh}}\,}}(M)$$PSh(M), including the properties of being atomic, strongly compact, local, totally connected or cohesive, correspond to semigroup-theoretic properties ofM.
Jens Hemelaer, Morgan Rogers
openaire   +3 more sources

Group Fuzzy Languages and its Generalizations

open access: yesRatio Mathematica, 2023
In fuzzy language theory, every monoid is the syntactic monoid of some fuzzy language. By using this result the properties of fuzzy language can be studied by the algebraic properties of the syntactic monoids. There are so many methods for studying fuzzy
Archana Vasudevan Pillai Prasanna   +2 more
doaj   +1 more source

Comultiplication on monoids

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
A comultiplication on a monoid S is a homomorphism m:S→S∗S (the free product of S with itself) whose composition with each projection is the identity homomorphism.
Martin Arkowitz, Mauricio Gutierrez
doaj   +1 more source

Finite coverings of semigroups and related structures [PDF]

open access: yesInternational Journal of Group Theory, 2023
For a semigroup $S$, the covering number of $S$ with respect to semigroups, $\sigma_s(S)$, is the minimum number of proper subsemigroups of $S$ whose union is $S$.
Casey Donoven, Luise-Charlotte Kappe
doaj   +1 more source

Weakly abundant semigroups within certain subsemigroups of the semigroup of full contraction mappings of a finite chain

open access: yesMathematics Open
Let [Formula: see text] be a finite n-chain [Formula: see text], and let [Formula: see text] be the monoid of full contraction mappings on [Formula: see text].
M. M. Zubairu, A. Umar, A. Jibrin
doaj   +1 more source

On Naturally Ordered Abundant Semigroups with an Adequate Monoid Transversal

open access: yesDiscrete Dynamics in Nature and Society, 2019
In this paper, we study a class of naturally ordered abundant semigroups with an adequate monoid transversal, namely, naturally ordered concordant semigroups with an adequate monoid transversal.
Wei Chen
doaj   +1 more source

TRIANGULAR MATRIX REPRESENTATIONS OF SKEW MONOID RINGS

open access: yes, 2010
Let R be a ring and S a u.p.-monoid. Assume that there is a monoid homomorphism α : S → Aut (R). Suppose that α is weakly rigid and lR(Ra) is pure as a left ideal of R for every element a ∈ R.
Zhongkui, Liu, Xiaoyan, Yang
core   +1 more source

On endomorphisms of groups of orders 37–47; pp. 137–150 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2017
It is proved that the finite groups of orders 37–47 are determined by their endomorphism monoids in the class of all groups.
Alar Leibak, Peeter Puusemp
doaj   +1 more source

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