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A concept of $\frac23$PROP and deformation theory of (co)associative bialgebras

Boris Shoikhet
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Abstract

We introduce a concept of $\frac23$PROP generalizing the Kontsevich concept of $\frac12$PROP. We prove that some Stasheff-type compactification of the Kontsevich spaces $K(m,n)$ defines a topological $\frac23$PROP structure. The corresponding chain complex is a minimal model for its cohomology (both are considered as $\frac23$PROPs). We construct a $\frac23$PROP $\End(V)$ for a vector space $V$. Finally, we construct a dg Lie algebra controlling the deformations of a (co)associative bialgebra. Philosophically, this construction is a version of the Markl's operadic construction from [M1] applied to minimal models of $\frac23$PROPs.

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Boris Shoikhet. 2003-11-19. A concept of $\frac23$PROP and deformation theory of (co)associative bialgebras. https://arxiv.org/abs/math/0311337

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