Some IHX type relations on trivalent graphs and symplectic representation theory

Abstract

We consider several algebras that arise in the study of the mapping class group (by means of topology and Hodge theory) and describe their symplectic-invariant parts in terms of algebras on trivalent graphs.

arXiv commentAMS-LaTeX, 10 pages with 8 figures. This is a slightly revised version, to appear in Math. Reserach Letters