Midwest Topology Seminar
Mark Behrens
University of Notre Dame
The ring cooperations for 2-primary tmf
Abstract: This talk represents joint work with Kyle Ormsby, Nat Stapleton, and
Vesna Stojanoska. I will describe 3 different perspective on tmf_*tmf
(localized at 2). (1) the E_2-term of the Adams spectral sequence for
tmf ^ tmf decomposes as a direct sum of ext groups associated to
bo-Brown-Gilter modules, (2) modulo torsion, tmf_*tmf embeds into the
ring of 2-variable modular forms, and (3) modulo v_2-torsion, tmf_*tmf
embeds into a product of TMF_0(N)_*, for various values of N, and how
they are related.
Saturday February 28, 2015 at 4:00 PM in Lecture Center F, Room 4