A concept of $\frac23$PROP and deformation theory of (co)associative bialgebras
Abstract
Description
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.
Dedicated to Borya Feigin in the occasion of his 50th birthday 17 pages, 5eps figures, latex
Dedicated to Borya Feigin in the occasion of his 50th birthday 17 pages, 5eps figures, latex