Results 101 to 110 of about 24,881 (221)
Semigroup actions on posets and preimage quasi-orders
, 2012 Structures consisting of a semigroup of (partial) functions on a set X, a poset of subsets of X, and a preimage operation linking the two, arise commonly throughout mathematics.
Stokes, Tim E.
core +1 more source
Green index and finiteness conditions for semigroups [PDF]
, 2008 Let S be a semigroup and let T be a subsemigroup of S. Then T acts on S by left and by right multiplication. If the complement S \ T has finitely many strong orbits by both these actions we say that T has finite Green index in S.
R. Gray +6 more
core +1 more source
Weighted veronese rings via convex semigroups
Bulletin of the London Mathematical Society, Volume 58, Issue 11, November 2026.Abstract We determine several properties of two‐dimensional normal affine semigroup rings, and in particular of weighted Veronese rings, including determinantal presentations, Gröbner bases, graded Hilbert series and graded Betti numbers, the structure of their associated graded rings, and their Koszul property.
Bek Chase +6 more
wiley +1 more source
On the Multiplier Semigroup of a Weighted Abelian Semigroup
Indian Journal of Pure and Applied Mathematics, 2019 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dabhi, Prakash A., Pandey, Manish Kumar
openaire +1 more source
Semigroup compactifications by generalized distal functions and a fixed point theorem
International Journal of Mathematics and Mathematical Sciences, 1991 The notion of Semigroup compactification which is in a sense, a generalization of the classical Bohr (almost periodic) compactification of the usual additive reals R, has been studied by J. F. Berglund et. al. [2].
R. D. Pandian
doaj +1 more source
Quantitative maximal L2$L^2$‐regularity for viscous Hamilton–Jacobi PDEs in 2D and Mean Field Games
Bulletin of the London Mathematical Society, Volume 58, Issue 11, November 2026.Abstract We discuss quantitative Calderón–Zygmund estimates in W2,2$W^{2,2}$ for 2D viscous Hamilton–Jacobi equations with natural growth in the gradient. We apply the result to obtain the existence of classical solutions for stationary second‐order mean field games systems in 2D with (defocusing) coupling behaving like mα$m^\alpha$ for any α>0$\alpha >
Alessandro Goffi
wiley +1 more source
The α-bicyclic semigroup as a topological semigroup
Semigroup Forum, 1984 C. Eberhart and J. Selden showed that the only Hausdorff topology on the bicyclic semigroup which makes it a topological semigroup is the discrete topology. A related result proved in this paper is the following: Let \(W_{\alpha}\) be the \(\alpha\)-bisimple semigroup. The only locally compact Hausdorff semigroup topology on \(W_{\alpha}\) is discrete.
openaire +2 more sources
, 2022 This paper aims to study orbital maps in the context of semigroup actions on topological spaces and fiber bundles. It presents results on the behavior of the dynamical objects involved in the theories of attraction and Lyapunov stability under orbital ...
Rocha, Victor H. L. [UNESP] +1 more
core +1 more source
Planarity ranks for varieties of equationally noetherian semigroups [PDF]
Известия Саратовского университета. Новая серия: Математика. Механика. ИнформатикаThe problem of describing semigroup varieties with finite planarity rank is researched. In addition to the previously obtained results the author finds new countable infinite series of semigroup varieties with finite planarity rank.
Solomatin, Denis Vladimirovich
doaj +1 more source
On Semigroup Presentations and Efficiency
, 2002 The purpose of this paper is twofold. First we determine some forms of the relations in a finite semigroup presentation with zero deficiency which does or does not define a group. Moreover, we conclude that a finite Rees matrix semigroup Script M sign[G;
Ayik H., Kuyucu F., Vatansever B.
core +1 more source