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The Batalin–Vilkovisky Algebra in the String Topology of Classifying Spaces

Published online by Cambridge University Press:  09 January 2019

Katsuhiko Kuribayashi
Affiliation:
Department of Mathematical Sciences, Faculty of Science, Shinshu University, Nagano 390-8621, Japan Email: kuri@math.shinshu-u.ac.jp
Luc Menichi
Affiliation:
LAREMA - UMR CNRS 6093, Université d’Angers, 2 Boulevard Lavoisier, 49045 Angers, France Email: luc.menichi@univ-angers.fr
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Abstract

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For almost any compact connected Lie group $G$ and any field $\mathbb{F}_{p}$, we compute the Batalin–Vilkovisky algebra $H^{\star +\text{dim}\,G}(\text{LBG};\mathbb{F}_{p})$ on the loop cohomology of the classifying space introduced by Chataur and the second author. In particular, if $p$ is odd or $p=0$, this Batalin–Vilkovisky algebra is isomorphic to the Hochschild cohomology $HH^{\star }(H_{\star }(G),H_{\star }(G))$. Over $\mathbb{F}_{2}$ , such an isomorphism of Batalin–Vilkovisky algebras does not hold when $G=\text{SO}(3)$ or $G=G_{2}$. Our elaborate considerations on the signs in string topology of the classifying spaces give rise to a general theorem on graded homological conformal field theory.

Type
Article
Copyright
© Canadian Mathematical Society 2018 

Footnotes

The first author was partially supported by JSPS KAKENHI Grant Number 25287008.

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