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It will be seen that if $H$ is a weak Hopf algebra in the definition of coaction of weak bialgebras on coalgebras \cite{Wang}, then a definition property is suppressed giving rise to the (global) coactions of weak Hopf algebras on…

Rings and Algebras · Mathematics 2020-09-22 Graziela Fonseca , Eneilson Fontes , Grasiela Martini

In this paper we introduce the notion of partial action of a weak Hopf algebra on algebras, unifying the notions of partial group action [11], partial Hopf action ([2],[3],[9]) and partial groupoid action [4]. We construct the fundamental…

Quantum Algebra · Mathematics 2015-11-12 Felipe Castro , Antonio Paques , Glauber Quadros , Alveri Sant'Ana

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

We introduce partial (co)actions of a Hopf algebra $H$ on an algebra. To this end, we introduce first the notion of lax coring, generalizing Wisbauer's notion of weak coring. We also have the dual notion of lax ring. Several duality results…

Rings and Algebras · Mathematics 2008-12-09 S. Caenepeel , K. Janssen

The duality between partial actions (partial $H$-module algebras) and co-actions (partial $H$-comodule algebras) of a Hopf algebra $H$ is fully explored in this work. A connection between partial (co)actions and Hopf algebroids is…

Rings and Algebras · Mathematics 2015-04-15 Eliezer Batista , Joost Vercruysse

Partial actions of groups on C*-algebras and the closely related actions and coactions of Hopf algebras received much attention over the last decades. They arise naturally as restrictions of their global counterparts to non-invariant…

Operator Algebras · Mathematics 2018-11-14 Franziska Kraken , Paula Quast , Thomas Timmermann

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 assure the existence of enveloping actions. This allows…

Rings and Algebras · Mathematics 2009-10-08 Marcelo Muniz S. Alves , Eliezer Batista

In this work, the notion of partial representation of a Hopf algebra is introduced and its relationship with partial actions of Hopf algebras is explored. Given a Hopf algebra $H$, one can associate it to a Hopf algebroid $H_{par}$ which…

Rings and Algebras · Mathematics 2013-09-23 Marcelo Muniz S. Alves , Eliezer Batista , Joost Vercruysse

This article develops the theory of fusion categories acting on algebras. We will demonstrate that weak Hopf algebra actions on algebras correspond to specific actions of fusion categories. As an application of this theory, we introduce a…

Quantum Algebra · Mathematics 2025-10-09 Alexander Betz

In this work, we review some properties of twisted partial actions of Hopf algebras on unital algebras and give necessary and sufficient conditions for a twisted partial action to have a globalization. We also elaborate a series of…

Quantum Algebra · Mathematics 2019-02-20 Marcelo M. S. Alves , Eliezer Batista , Michael Dokuchaev , Antonio Paques

In this paper, we characterize suitable partial (co)actions of Taft and Nichols Hopf algebras on algebras, and moreover we get that such partial (co)actions are symmetric. For certain algebras, these partial (co)actions obtained are,…

Rings and Algebras · Mathematics 2022-08-11 Graziela Fonseca , Grasiela Martini , Leonardo Silva

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

The main purpose of this paper is to unify the theory of actions of Hopf algebras, weak Hopf algebras and multiplier Hopf algebras to one of actions of weak multiplier Hopf algebras introduced by A. Van Daele and S. H. Wang. Using such…

Rings and Algebras · Mathematics 2017-03-09 Nan Zhou , Shuanhong Wang

In partial action theory, a pertinent question is whenever given a partial (co)action of a Hopf algebra A on an algebra R, it is possible to construct an enveloping (co)action. The authors Alves and Batista, in [2],have shown that this is…

Rings and Algebras · Mathematics 2019-05-07 Eneilson Fontes , Graziela Fonseca , Grasiela Martini

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

We introduce the notion of partial representation of a weak Hopf algebra. We present the universal algebra $H_{par}^w$, which factorizes these partial representations by algebra morphisms. Also, it is shown that $\Hp$ is isomorphic to a…

Quantum Algebra · Mathematics 2024-12-19 Felipe Castro , Glauber Quadros , Thaísa Tamusiunas

We survey Hopf algebras and their generalizations. In particular, we compare and contrast three well-studied generalizations (quasi-Hopf algebras, weak Hopf algebras, and Hopf algebroids), and two newer ones (Hopf monads and hopfish…

Quantum Algebra · Mathematics 2010-02-03 Gizem Karaali

We introduce "geometric" partial comodules over coalgebras in monoidal categories, as an alternative notion to the notion of partial action and coaction of a Hopf algebra introduced by Caenepeel and Janssen. The name is motivated by the…

Rings and Algebras · Mathematics 2019-11-25 Jiawei Hu , Joost Vercruysse

We introduce the notion of a dilation for a partial representation (i.e. a partial module) of a Hopf algebra, which in case the partial representation origins from a partial action (i.e.a partial module algebra) coincides with the…

Representation Theory · Mathematics 2019-03-13 Marcelo Muniz S. Alves , Eliezer Batista , Joost Vercruysse

In this work, we give a survey of recent developments in the theory of partial actions of groups and Hopf algebras.

Rings and Algebras · Mathematics 2017-10-04 Eliezer Batista
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