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We prove that every ordered partial action of an inverse semigroupoid on a partially ordered set admits a globalization. This result is used to establish a connection between ordered partial actions of groupoids and a multi-object analogue…

Given a partial action $\theta$ of a group on a set with an algebraic structure, we construct a reflector of $\theta$ in the corresponding subcategory of global actions and study the question when this reflector is a globalization. In…

Category Theory · Mathematics 2017-05-12 Mykola Khrypchenko , Boris Novikov

We introduce partial semigroupoid actions on sets and demonstrate that each such action admits universal globalization. Our construction extends the universal globalization for partial category actions given by P. Nystedt (Lundstr\"om) and…

Rings and Algebras · Mathematics 2025-12-11 Rafael Haag Petasny , Thaísa Tamusiunas

We introduce (continuous) partial category actions on sets (topological spaces) and show that each such action admits a universal globalization. Thereby, we obtain a simultaneous generalization of corresponding results for groups, by…

Rings and Algebras · Mathematics 2017-04-26 Patrik Nystedt

We propose two universal constructions of globalization of a partial action of a semigroup on a set, satisfying certain conditions which arise in Morita theory of semigroups. One of the constructions is based on the tensor product of a…

Rings and Algebras · Mathematics 2024-10-29 Ganna Kudryavtseva , Valdis Laan

We provide a necessary and sufficient condition to the existence of an ordered globalization of a partial ordered action of an ordered groupoid on a ring and we also present criteria to obtain uniqueness. Furthermore, we apply those results…

Rings and Algebras · Mathematics 2025-01-03 Wesley G. Lautenschlaeger , Thaísa Tamusiunas

We study the globalization of partial actions on sets and topological spaces and of partial coactions on algebras by applying the general theory of globalization for geometric partial comodules, as previously developed by the authors. We…

Rings and Algebras · Mathematics 2022-03-31 Paolo Saracco , Joost Vercruysse

A generalization of G-sets, called partial G-sets, are the sets that admit an action of partial maps on their subsets. Partial actions are a powerful tool to generalize many results of group actions. These generalizations are obtained by…

Rings and Algebras · Mathematics 2016-02-01 Ram Parkash Sharma , Meenakshi

Let $M$ be a monoid, $\mathscr{C}$ a category with pullbacks and $X$ an object of $\mathscr{C}$. We introduce the notion of a partial action $\alpha$ of $M$ on $X$ and study the globalization question for $\alpha$. If $\alpha$ admits a…

Category Theory · Mathematics 2026-02-05 Mykola Khrypchenko , Francisco Klock

In this paper, we introduce the notion of globalization for partial module coalgebra and for partial comodule coalgebra. We show that every partial module coalgebra is globalizable exhibiting a standard globalization. We also show the…

Rings and Algebras · Mathematics 2019-11-26 Felipe Castro , Glauber Quadros

We study the relations between partial and global group cohomology with values in a commutative unital ring $\mathcal{A}$. In particular, for a unital partial action of a group $G$ on $\mathcal{A}$, such that $\mathcal{A}$ is a direct…

Rings and Algebras · Mathematics 2020-07-08 Mikhailo Dokuchaev , Mykola Khrypchenko , Juan Jacobo Simón

We extend the concept of a partial group action to non-associative algebras in a variety \(\mathcal{V}(I)\), solve the globalization problem within \(\mathcal{V}(I)\) and examine its universal property. It is achieved using what we call the…

Rings and Algebras · Mathematics 2026-04-24 Mikhailo Dokuchaev , Emmanuel Jerez , José L. Vilca-Rodríguez

The main goal of this paper is to introduce the notion of twisted partial action of groupoids. We generalize the theorem about the existence of an enveloping action, also known as the globalization theorem, and show that the crossed…

Rings and Algebras · Mathematics 2021-05-10 Laerte Bemm , Wesley G. Lautenschlaeger , Thaísa Tamusiunas

Partial actions of Hopf algebras can be considered as a generalization of partial actions of groups on algebras. Among important properties of partial Hopf actions, it is possible to prove the existence of enveloping actions, i.e., every…

Rings and Algebras · Mathematics 2010-08-19 Marcelo Muniz S. Alves , Eliezer Batista

In this paper we introduce the notion of a partial action of a groupoid on a ring as well as we give a criteria for the existence of a globalization of it. We construct a Morita context associated to a globalizable partial groupoid action…

Rings and Algebras · Mathematics 2015-11-12 Dirceu Bagio , Antonio Paques

Let A be a unital ring which is a product of possibly infinitely many indecomposable rings. We establish criteria for the existence of a globalization for a given twisted partial action of a group on A. If the globalization exists, it is…

Rings and Algebras · Mathematics 2010-03-16 M. Dokuchaev , R. Exel , J. J. Simón

We generalize Exel's notion of partial group action to monoids. For partial monoid actions that can be defined by means of suitably well-behaved systems of generators and relations, we employ classical rewriting theory in order to describe…

General Topology · Mathematics 2007-05-23 Michael Megrelishvili , Lutz Schroeder

In this article, we introduce the concept of partial groupoid actions on R- semicategories as well as we give criteria for existence of a globalization of it. This point of view is a generalization of the notions of partial groupoid actions…

Rings and Algebras · Mathematics 2018-11-29 V. Marín , H. Pinedo

We study the globalization problem for a strong partial action $\alpha$ of a monoid $M$ on a semigroup $X$ via the associated rewriting system $(X_M^+,\to)$. We show that the local confluence of $(X_M^+,\to)$ is sufficient for the…

Group Theory · Mathematics 2025-12-25 Mykola Khrypchenko , Francisco Klock

We prove a structure result on proper extensions of two-sided restriction semigroups in terms of partial actions, generalizing respective results for monoids and for inverse semigroups and upgrading the latter. We introduce and study…

Rings and Algebras · Mathematics 2024-10-29 Mikhailo Dokuchaev , Mykola Khrypchenko , Ganna Kudryavtseva
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