• • 4/10/2019: 6d (1,0) theories on 4-manifolds
  • 6/4/2019 Cayley cycles and modular forms

April 10, 2019
TITLE: 6d (1,0) theories on 4-manifolds

Lecture cancelled.

June 4, 2019
TITLE: Cayley cycles and modular forms

ABSTRACT: In the M/string-theory setting, 5-branes wrapping a Cayley cycle in a
local Spin(7)-manifold define an effective 2d conformal field theory
with minimal supersymmetry. From mathematical point of view, this
predicts existence of an invariant of smooth spin 4-manifolds valued in
the ring of (topological) modular forms. In my talk I will describe
general properties of this map and consider an example.