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[PDF] Top 20 On the irreducibility of pseudovarieties of semigroups

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On the irreducibility of pseudovarieties of semigroups

On the irreducibility of pseudovarieties of semigroups

... Since the establishment of Eilenberg’s correspondence between varieties of regular languages and pseudovarieties of semigroups [5], the theory of fi- nite ... See full document

9

A Study on Rough, Fuzzy and Rough Fuzzy Bi-ideals of Ternary Semigroups

A Study on Rough, Fuzzy and Rough Fuzzy Bi-ideals of Ternary Semigroups

... congruences on ternary semi- groups. Congruence is a special type of equivalence relation which plays a vital role in the quotient structure of algebraic ...ρ on T is an equivalence ... See full document

5

Takahasi semigroups

Takahasi semigroups

... theorem on chains of subgroups of bounded rank in a free group is generalized to several classes of ...that the subsemigroups of periodic points are finitely generated and ... See full document

26

Irreducibility of moduli of semi-stable chains and applications to U(P, q)-Higgs bundles

Irreducibility of moduli of semi-stable chains and applications to U(P, q)-Higgs bundles

... approach the problem using the fact that systems of Hodge bundles can be viewed as holomorphic ...that the necessary conditions found in [6] for the existence of semistable ... See full document

14

On fuzzy soft bi-ideals over semigroups

On fuzzy soft bi-ideals over semigroups

... introduced the first notions of the fuzzy soft semigroups and fuzzy soft (left, right) ideals over semi- ...image of fuzzy semigroups are fuzzy soft semi- ...product of ... See full document

8

A characterization of adequate semigroups by forbidden subsemigroups

A characterization of adequate semigroups by forbidden subsemigroups

... that the class of adequate semigroups is properly contained in the class of amiable semigroups, because he constructed an infinite amiable, but not adequate, ...coincide ... See full document

7

Numerical semigroups with a given set of pseudo-Frobenius numbers

Numerical semigroups with a given set of pseudo-Frobenius numbers

... for the case that the set PF consists of a single element (which must be the Frobenius number of a numerical semigroup, symmetric numerical semigroups) or when PF consists ... See full document

21

A method for finding new sets of axioms for classes of semigroups

A method for finding new sets of axioms for classes of semigroups

... based on the Cayley representation of ...Variations of the method based on other representations of classes of semi- groups will lead to di↵erent sets of ... See full document

15

The word problem and some reducibility properties for pseudovarieties of the form DRH

The word problem and some reducibility properties for pseudovarieties of the form DRH

... set of identities for a Mal’cev product, which in turn implies that the decidability of idempotent pointlike sets may be used as a sufficient condition for decidability of Mal’cev products ... See full document

164

Algebraic aspects of tiling semigroups

Algebraic aspects of tiling semigroups

... view of a result proved in Chapter 1, this yields the desired ...tiling semigroups, the presentation obtained throws an interesting light over the structure of these ... See full document

214

Conjugation in semigroups

Conjugation in semigroups

... action of any group on itself by conjugation and the corresponding conjugacy relation play an important role in group ...extend the notion of conjugacy to ...definition of ... See full document

34

Random walks on semaphore codes and delay de Bruijn semigroups

Random walks on semaphore codes and delay de Bruijn semigroups

... to the semaphore code given by this ideal is ...have the same hitting time to reset, but in general different stationary ...so the stationary distributions cannot be the ...from the ... See full document

34

Conjugation in abstract semigroups

Conjugation in abstract semigroups

... with the usual notion. For elements a, b, g of a group G, if a = g −1 bg, then we say that a and b are conjugate and g (or g −1 ) is a conjugator of a and ...define the following relation ... See full document

37

Green's Relations in Ordered Gamma-Semigroups in Terms of Fuzzy Subsets

Green's Relations in Ordered Gamma-Semigroups in Terms of Fuzzy Subsets

... terms of ordered right ideals, ordered left ideals, ordered ideals and the concept of fuzzy sets play an important role in studying the structure of ordered ...characterize the ... See full document

6

he characterization of regular ordered semigroups by (e,e v q)-fuzzy ideals

he characterization of regular ordered semigroups by (e,e v q)-fuzzy ideals

... concept of fuzzy set was introduced by Zadeh[1] in ...papers on fuzzy sets appeared showing the importance of the concept and its applications to logic,set theory, groups theory, ... See full document

15

Two generalizations of homogeneity in groups with applications to regular semigroups

Two generalizations of homogeneity in groups with applications to regular semigroups

... 4. The orbits of PGL(2, q) on the 4-tuples of distinct points are parametrised by cross-ratio, of which there are q − 2 distinct ...depending on the congruence ... See full document

29

Semigroups of transformations preserving an equivalence relation and a cross-section

Semigroups of transformations preserving an equivalence relation and a cross-section

... ρ on X, and a cross-section R of the partition X/ρ induced by ρ, consider the semigroup T (X, ρ, R) consisting of all mappings a from X to X such that a preserves both ρ (if (x, y) ∈ ρ ... See full document

17

Automorphisms of partial endomorphism semigroups

Automorphisms of partial endomorphism semigroups

... be the monoids of all total, partial, and partial injective order-preserving and order-reversing mappings of the usual total order on {1, ...in the literature, for example see ... See full document

17

Normally ordered semigroups

Normally ordered semigroups

... is the largest class of finite semigroups for which one can consider a Munn type representation, ...be the Munn representation of S. As already observed, the semigroup Sδ is a ... See full document

10

Near permutation semigroups

Near permutation semigroups

... chain of order N , are generated by a group of permutations and by an idempotent of rank N − 1 (see ...all semigroups generated by a group of permutations on N elements and by an ... See full document

11

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