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Deformation Theory Seminar

Wednesday, March 18, 2009 - 2:00pm

Ron Umble

Millersville U

Location

University of Pennsylvania

DRL 4N30

Joint work with Samson Saneblidze

We show that over a field, the homology H of an A-infinity algebra A admits a canonical A-infinity algebra structure. Given a cycle selection map f : H \to A, there is a construction involving the multiplihedra by which the A-infinity algebra structure on A pulls back along f to a canonical A-infinity algebra structure on H. Whereas our construction does not require that f have a homotopy inverse, this generalizes the Basic Perturbation Lemma. We demonstrate this with an example involving a non-homotopy equivalence. Finally, we mention that our construction transfers directly to the category of A-infinity bialgebras. Consequently, the homology of a loop space over a field is canonically an A-infinity bialgebra.