The Feynman transform is an operation on the category of twisted modular operads. It gives a way to parametrize various versions of the Kontsevich’s graph complex, by various modular operads. Every modular operad is in particular cyclic (some say “symplectic”). The Feynman transform, up to a shift, reduces to the cobar operad? of the underlying cyclic operad.
Joseph Chuang, Andrey Lazarev, Dual Feynman transform for modular operads, arxiv/0704.2561
Martin Markl, Steve Shnider, Jim Stasheff, Operads in algebra, topology and physics, Mathematical Surveys and Monographs 96, Amer. Math. Soc. 2002. x+349 pp. MR2003f:18011(for Feynman transform see page 251)
Revised on September 16, 2010 19:04:27
by Toby Bartels