I will present a paper by Renato Bettiol in which the author constructs a family of metrics on S^2xS^2 that are arbitrarily close to the standard metric, and for which the average of the sectional curvature of any 2 orthogonal 2- planes is strictly positive.
Graduate Student Geometry-Topology Seminar
Wednesday, December 5, 2012 - 2:00pm
Dmytro Yeroshkin
Penn