Higher Virasoro algebras

Name: Higher Virasoro algebras
Start: 2026-09-10T16:30:00+00:00
End: 2026-09-10T17:30:00+00:00
Location: CMSA, 20 Garden St, G10

CMSA GEOMETRY AND MATHEMATICAL PHYSICS SEMINAR

When: September 10, 2026

4:30 pm - 5:30 pm

Where: CMSA, 20 Garden St, G10

Address: 20 Garden Street, Cambridge, MA 02138, United States

Speaker: Brian Williams (Boston University)

I will introduce and classify central extensions of the dg Lie algebra of derived global sections of the tangent sheaf on the punctured d-disk for d > 1. Then, I will formulate and sketch the proof of a formal and universal version of the Grothendieck–Riemann–Roch theorem. Time permitting I will discuss how to generalize this work to complements of other algebraic subvarities of affine space. This is joint work with Zhengping Gui.