Results 91 to 100 of about 27,754 (248)

On Maximal Subsemigroups of Partial Baer-Levi Semigroups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2011
Suppose that X is an infinite set with |X|≥q≥ℵ0 and I(X) is the symmetric inverse semigroup defined on X. In 1984, Levi and Wood determined a class of maximal subsemigroups MA (using certain subsets A of X) of the Baer-Levi semigroup BL(q)={α∈I(X): dom α=
Boorapa Singha, Jintana Sanwong
doaj   +1 more source

Semitransitive and transitive subsemigroups of the inverse symmetric semigroups

open access: yes, 2007
We classify minimal transitive subsemigroups of the finitary inverse symmetric semigroup modulo the classification of minimal transitive subgroups of finite symmetric groups; and semitransitive subsemigroups of the finite inverse symmetric semigroup of ...
Bukovšek, Damjana Kokol   +5 more
core  

Free Strict Inverse Semigroups

open access: yesJournal of Algebra, 1993
An inverse semigroup is ``strict'' if it is a subdirect product of Brandt semigroups and groups. Strict inverse semigroups form a variety of inverse semigroups. Other than the varieties of Clifford semigroups, its subvarieties are those of the form \({\mathbf H}\vee{\mathbf B}\), where \(\mathbf H\) is some variety of groups and \(\mathbf B\) is the ...
openaire   +2 more sources

Inversions of Hermite Semigroup [PDF]

open access: yesProceedings of the American Mathematical Society, 1993
Let { e − c H | c ⩾ 0 } \{ {e^{ - cH}}|c \geqslant 0\} be the Hermite semigroup on the real line R \mathbb {R} . Then a representation is constructed
openaire   +1 more source

An analogue of Bernside's lemma for finite inverse symmetric semigroup

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2010
An analogue of Bernside's lemma for transitive permutation representations of finite inverse symmetric semigroup is obtained.
Voloshyna T.V.
doaj  

Non-commutative finite monoids of a given order n ≥ 4

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2014
For a given integer n=p1α1p2α2⋯pkαk$n = p_1^{\alpha _1 } p_2^{\alpha _2 } \cdots p_k^{\alpha _k }$ (k ≥ 2), we give here a class of finitely presented finite monoids of order n. Indeed the monoids Mon(π), where π=〈a1,a2,…,ak|aipiαi=ai, (i=1,2,…,k),aiai+
Ahmadi B., Campbell C.M., Doostie H.
doaj   +1 more source

Studio di una classe notevole di anelli dotata di inverso generalizzato

open access: yesLe Matematiche, 2008
We study a remarkable class of rings, which we call corpids, that is the rings, different from zero, (K;+; .); such that (K; .) is an inverse semi-group (or groupid, which is the name given by G. Tallini [4]).
Maria Scafati Tallini, Maurizio Iurlo
doaj  

Corpidi e loro proprietà

open access: yesLe Matematiche, 2009
A corpid is a ring (K, +, ·), different from zero, such that (K, ·) is an inverse semigroup. We prove a characterization of corpids, some remarkable results about the lattice of the idempotents and other results concerning the idempotents and the zero ...
Maria Scafati Tallini, Maurizio Iurlo
doaj  

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