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arXiv 2008.09937math.QA
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泛量子(半)群与Hopf包络

Universal quantum (semi)groups and Hopf envelopes

Marco Farinati

摘要:

我们证明了,在$A(c)$ = FRT结构的编织向量空间$(V,c)$承认一个弱Frobenius代数$\mathfrak B$(例如,如果编织是刚性的,其尼科尔斯代数是有限维),那么Hopf包络的$A(c)$是简单的本地化$A(c)$由一个单一的元素称为量子行列式相关联的弱Frobenius代数。这推广了作者与Gastón A. García在\cite{FG}中证明了同样的陈述,但有额外的假设,我们现在知道是不必要的。在此基础上,我们给出了一种构造有限维向量空间上泛双代数的通用方法,并给出了由映射族$\{f_i:V^{\otimes n_i}\to V^{\otimes m_i}\}$给出的代数结构。Dubois-Violette和Launer的霍普夫代数和FRT结构的余拟三角性质在证明中起着基础性的作用。

英文摘要:

We prove that, in case $A(c)$ = the FRT construction of a braided vector space $(V,c)$ admits a weakly Frobenius algebra $\mathfrak B$ (e.g. if the braiding is rigid and its Nichols algebra is finite dimensional), then the Hopf envelope of $A(c)$ is simply the localization of $A(c)$ by a single element called the quantum determinant associated to the weakly Frobenius algebra. This generalizes a result of the author together with Gastón A. García in \cite{FG}, where the same statement was proved, but with extra hypotheses that we now know were unnecessary. On the way, we describe a universal way of constructing a universal bialgebra attached to a finite dimensional vector space together with some algebraic structure given by a family of maps $\{f_i:V^{\otimes n_i}\to V^{\otimes m_i}\}$. The Dubois-Violette and Launer Hopf algebra and the co-quasi triangular property of the FRT construction play a fundamental role on the proof.

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