# Seminar detail

 Upcoming Seminars No upcoming seminars currently scheduled. Past Seminars Tue04/17/20184:00pm Seminar: AlgebraVector-valued Hirzebruch-Zagier series and class number sumsBrandon Williams, UC BerkeleyContact: David Zureick-Brown, dzb@mathcs.emory.eduVenue: Mathematics and Science Center, Room W304Download printable flyer (PDF, 55.6 kB)Hide abstractFor any fundamental discriminant $D > 0$, Hirzebruch and Zagier constructed a modular form of weight two whose Fourier coefficients are corrections of the Hurwitz class number sums $\sum_{r^2 \equiv 4n \, (D)} H((4n - r^2) / D)$. In this talk, we will discuss how one can reinterpret their result and remove the condition that $D$ is fundamental by working instead with vector-valued modular forms for Weil representations.