Edited to add Galway
I’ll be doing a “US tour” in March / April. For the people who might be interested – here are my whereabouts, and my speaking engagements.
I’m booked at several different seminars to do the following:
Title: On the computation of A-infinity algebras and Ext-algebras
For a ring R, the Ext algebra carries rich information about the ring and its module category. The algebra is a finitely presented k-algebra for most nice enough rings. Computation of this ring is done by constructing a projective resolution P of k and either constructing the complex or equivalently constructing the complex . By diligent choice of computational route, the computation can be framed as essentially computing the homology of the differential graded algebra .
Being the homology of a dg-algebra, has an induced A-infinity structure. This structure, has been shown by Keller and by Lu-Palmieri-Wu-Zhang, can be used to reconstruct R from
In this talk, we shall discuss the computation of and methods for computing an A-infinity structure on the Ext algebra. Examples will be drawn from group cohomology, where the computation of the Ext algebra has conditions from Benson and Carlson for recognizing whether a partial computation has the entire structure.
Talk dates are:
19 – Stockholm University
26 – UPenn
27 – Millersville
29/30 – Graduate Student Topology Conference, UIUC
8 – Stanford
11 – U Washington, Seattle
8 – NUI Galway
I will be in Millersville, with occasional visits to UPenn during March 25-28 and April 10-20. I’ll be somewhere in Illinois most of March 28, and at UIUC for the GSTC 29-30. I’ll be at MSRI March 31-April 4, and then at Stanford April 4-10.