We give an overview of publications on partial actions and related concepts, paying main
attention to some recent developments on diverse aspects of the theory, such as partial …

Using an algebraic point of view we present an introduction to the groupoid theory; that is,
we give fundamental properties of groupoids as uniqueness of inverses and properties of …

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Log in Menu Find a journal Publish with us Search Cart 1.Home 2.Bulletin of the Brazilian …

In this paper, 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 …

Some conditions for the Galois map to be injective are given in the groupoid acting on a
noncommutative ring context. In the particular case in which the Galois extension is a central …

We introduce maximal ordered groupoids and study some of their properties. Also, we use
the Ehresmann–Schein–Nambooripad Theorem, which establishes a one-to-one …

Let G and K be groupoids. We present the notion of a (G α, K β)-set and we prove a duality
theorem in this context, which extends the duality theorem for graded algebras by groups …

Descent theory for linear categories is developed. Given a linear category as an extension of
a diagonal category, we introduce descent data, and the category of descent data is …

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 …