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arXiv 1306.1459math.QA
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关于弱双代数范畴

On the category of weak bialgebras

Gabriella Böhm, José Gómez-Torrecillas, Esperanza López-Centella

摘要:

弱(Hopf)双代数在适当的duoidal(也称为2-monoidal)范畴中被描述为(Hopf)双幂零。这个解释被用来定义一个域上弱双代数的范畴wba。作为一个应用,我们证明了从具有多个对象的小范畴到wba的“自由向量空间”函子具有一个右伴随,通过取(某些)类群元素给出。证明了这一附加分别限制于群胚和弱霍普夫代数的满子范畴。作为推论,我们得到了具有2个多对象的小范畴与点余半单弱双代数范畴,以及具有2个多对象的小广群范畴与点余半单弱霍普夫代数范畴之间的等价性.

英文摘要:

Weak (Hopf) bialgebras are described as (Hopf) bimonoids in appropriate duoidal (also known as 2-monoidal) categories. This interpretation is used to define a category wba of weak bialgebras over a given field. As an application, the "free vector space" functor from the category of small categories with finitely many objects to wba is shown to possess a right adjoint, given by taking (certain) group-like elements. This adjunction is proven to restrict to the full subcategories of groupoids and of weak Hopf algebras, respectively. As a corollary, we obtain equivalences between the category of small categories with finitely many objects and the category of pointed cosemisimple weak bialgebras; and between the category of small groupoids with finitely many objects and the category of pointed cosemisimple weak Hopf algebras.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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