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Search Results: 1 - 10 of 32250 matches for " Antonio Paques "
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Partial groupoid actions: globalization, Morita theory and Galois theory
Dirceu Bagio,Antonio Paques
Mathematics , 2011, DOI: 10.1080/00927872.2011.592889
Abstract: 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 and we introduce the notion of a partial Galois extension, which is related to the strictness of this context.
Duality for groupoid (co)actions
Daiana Fl?res,Antonio Paques
Mathematics , 2012, DOI: 10.1080/00927872.2012.720323
Abstract: In this paper we present Cohen-Montgomery-type duality theorems for groupoid (co)actions.
A Galois-Grothendieck-type correspondence for groupoid actions
Antonio Paques,Thaísa Tamusiunas
Mathematics , 2013,
Abstract: In this paper we present a Galois-Grothendieck-type correspondence for groupoid actions. As an application a Galois-type correspondence is also given.
Partial actions of weak Hopf algebras: smash products, globalization and Morita theory
Felipe Castro,Antonio Paques,Glauber Quadros,Alveri Sant'Ana
Mathematics , 2014, DOI: 10.1016/j.jpaa.2015.05.031
Abstract: 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 tools to develop this new subject, namely, the partial smash product and the globalization of a partial action, as well as, we establish a connection between partial and global smash products via the construction of a surjective Morita context. In particular, in the case that the globalization is unital, these smash products are Morita equivalent. We show that there is a bijective correspondence between globalizable partial groupoid actions and symmetric partial groupoid algebra actions, extending similar result for group actions [9]. Moreover, as an application we give a complete description of all partial actions of a weak Hopf algebra on its ground field, which suggests a method to construct more general examples.
Twisted partial actions of Hopf algebras
Marcelo Muniz S. Alves,Eliezer Batista,Michael Dokuchaev,Antonio Paques
Mathematics , 2011, DOI: 10.1007/s11856-013-0032-9
Abstract: In this work, the notion of a twisted partial Hopf action is introduced as a unified approach for twisted partial group actions, partial Hopf actions and twisted actions of Hopf algebras. The conditions on partial cocycles are established in order to construct partial crossed products, which are also related to partially cleft extensions of algebras. Examples are elaborated using algebraic groups.
Partial bi(co)module algebras, globalizations, and partial (L,R)-smash products
Felipe Castro,Antonio Paques,Glauber Quadros,Alveri Sant'Ana
Mathematics , 2015,
Abstract: In this paper we introduce the notions of partial bimodule algebra and partial bico- module algebra. We also deal with the existence of globalizations for these structures, generalizing related results appeared in [2, 4]. As an application we construct the partial (L;R)-smash product, extending the corresponding global notion appeared in [14] to the context of partial Hopf actions.
Globalization of Twisted partial Hopf actions
Marcelo M. S. Alves,Eliezer Batista,Michael Dokuchaev,Antonio Paques
Mathematics , 2015,
Abstract: 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 examples.
La bande dessinée en Belgique francophone au XIXe siècle
Frédéric Paques
Comicalités : études de Culture Graphique , 2012, DOI: 10.4000/comicalites.716
Abstract: La Belgique a une grande tradition de production de bandes dessinées et reconna t le neuvième art comme l’un des fleurons de sa culture nationale. Pourtant, la plupart des livres traitant d’histoire de la bande dessinée dans ce pays ignorent totalement l’époque pré-hergéenne. Et pour cause, la production de bande dessinée en Belgique est à la fois relativement peu nombreuse et, pour une bonne part, tributaire de l’influence étrangère. De plus, les bandes dessinées présentant du texte sous l’image ont longtemps été complètement ignorées par les historiens du sujet. Cet article se propose de rechercher les diverses apparitions de séquences d’images au XIXe siècle et de les contextualiser. Nombre des exemples que nous avons trouvés constituent des expériences sans lendemain, produites dans des contextes différents de celui qui donnera naissance à la bande dessinée belge de l’age d’or : trouver une filiation directe n’était pas notre but premier. Pourtant, du Déluge à Bruxelles créé en 1843 par Richard de Querelles aux images populaires du Liégeois Georges Ista, juste avant la première guerre mondiale, la bande dessinée belge au XIXe siècle se révèle au final d’une richesse et d’un intérêt insoup onnés jusqu’ici. Belgium has a great tradition of production of comic strips and recognizes the 9th art as one of the jewels of its national culture. Nevertheless, most of the books dealing with history of the comic strip in this country ignore totally the time before Hergé. For a good reasons : the production of comic strip in Belgium is relatively rare and, largely, dependent on the foreign influence. Furthermore, comic strips presenting text under the image were completely ignored for a long time by the historians of the subject. What we suggested making in our work, is looking for the diverse appearances of sequences of images through time and contextualise them. Number of the examples which we found constitutes experiments without future, produced in contexts different from the one who will give rise to the Belgian comic strip of the golden age : finding a direct filiation was not our first purpose. Nevertheless, from Le Déluge à Bruxelles created in 1843 by Richard de Querelles to the popular images of Georges Ista, just before the first world war, the Belgian comic strip in the XIXth century shows itself of a wealth and an interest unsuspected up to here.
Lipases de látex vegetais: propriedades e aplica??es industriais
Paques, Fernanda Wiermann;Macedo, Gabriela Alves;
Química Nova , 2006, DOI: 10.1590/S0100-40422006000100018
Abstract: biocatalysts have innumerous advantages with respect to classical chemical processes, such as high specificity. lipases (ec 3.1.1.3) are biocatalysts with large application in synthesis and hydrolysis reactions of triacylglycerols. the search for new sources of lipases has been intensified in the last years due to the high cost of microbial and animal lipases, wich restricts their use on an industrial scale. lipases obtained from the latex of carica papaya, carica pentagona, euphorbia characias, e. wulfenii, known for their proteolytic properties, are a good alternative source. in this review, we describe the well-known sources of vegetal lipases extracted from the latex and present some of their industrial applications.
Lipases de látex vegetais: propriedades e aplica es industriais
Paques Fernanda Wiermann,Macedo Gabriela Alves
Química Nova , 2006,
Abstract: Biocatalysts have innumerous advantages with respect to classical chemical processes, such as high specificity. Lipases (EC 3.1.1.3) are biocatalysts with large application in synthesis and hydrolysis reactions of triacylglycerols. The search for new sources of lipases has been intensified in the last years due to the high cost of microbial and animal lipases, wich restricts their use on an industrial scale. Lipases obtained from the latex of Carica papaya, Carica pentagona, Euphorbia characias, E. wulfenii, known for their proteolytic properties, are a good alternative source. In this review, we describe the well-known sources of vegetal lipases extracted from the latex and present some of their industrial applications.
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