Results 31 to 40 of about 10,485 (179)

Positive answers to Koch’s problem in special cases

open access: yesTopological Algebra and its Applications, 2020
A topological semigroup is monothetic provided it contains a dense cyclic subsemigroup. The Koch problem asks whether every locally compact monothetic monoid is compact.
Banakh Taras   +4 more
doaj   +1 more source

Subordinators on Feller Topological Monoids

open access: yes, 2022
We investigate a class of topological monoids with a suitable family of characters which we call Feller topological monoids. We extend the classical notion of subordinators to subordinators on Feller topological monoids. Under suitable assumptions, we prove a Lévy-Khintchine type representation for such subordinators.
Cendejas, Ulises Pérez   +1 more
openaire   +2 more sources

On topologization of the bicyclic monoid

open access: yesVisnyk Lvivskogo Universytetu Seriya Mekhaniko-Matematychna, 2023
8 ...
Chornenka, Adriana, Gutik, Oleg
openaire   +2 more sources

Topological spaces versus frames in the topos of $M$-sets [PDF]

open access: yesCategories and General Algebraic Structures with Applications
In this paper we study topological spaces, frames, and their confrontation in the presheaf topos of $M$-sets for a monoid $M$. We introduce the internalization, of the frame of open subsets for topologies, and of topologies of points for frames, in our ...
Mojgan Mahmoudi, Amir H. Nejah
doaj   +1 more source

A counterexample to the reconstruction of $\omega$-categorical structures from their endomorphism monoids [PDF]

open access: yes, 2016
We present an example of two countable $\omega$-categorical structures, one of which has a finite relational language, whose endomorphism monoids are isomorphic as abstract monoids, but not as topological monoids -- in other words, no isomorphism between
Bodirsky, Manuel   +3 more
core   +2 more sources

A bridge theorem for the entropy of semigroup actions

open access: yesTopological Algebra and its Applications, 2020
The topological entropy of a semigroup action on a totally disconnected locally compact abelian group coincides with the algebraic entropy of the dual action.
Bruno Anna Giordano
doaj   +1 more source

Separation Property for wB- and wS-regular Languages [PDF]

open access: yesLogical Methods in Computer Science, 2014
In this paper we show that {\omega}B- and {\omega}S-regular languages satisfy the following separation-type theorem If L1,L2 are disjoint languages of {\omega}-words both recognised by {\omega}B- (resp.
Michał Skrzypczak
doaj   +1 more source

Bounded Sets in Topological Spaces

open access: yesAxioms, 2022
Let G be a monoid that acts on a topological space X by homeomorphisms such that there is a point x0∈X with GU=X for each neighbourhood U of x0. A subset A of X is said to be G-bounded if for each neighbourhood U of x0 there is a finite subset F of G ...
Cristina Bors   +2 more
doaj   +1 more source

Completions and Fibrations for Topological Monoids [PDF]

open access: yesTransactions of the American Mathematical Society, 1993
We show that, for a certain class of topological monoids, there is a homotopy equivalence between the homotopy theoretic group completion M + {M^ + } of a monoid M M in that class and the topologized Grothendieck group M ~ \tilde M
openaire   +2 more sources

Cohomology of Presheaves of Monoids

open access: yesMathematics, 2020
The purpose of this work is to extend Leech cohomology for monoids (and so Eilenberg-Mac Lane cohomology of groups) to presheaves of monoids on an arbitrary small category.
Pilar Carrasco, Antonio M. Cegarra
doaj   +1 more source

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