[Binghamton Geometry/Topology Seminar] Reminder: Geometry/Topology seminar TODAY (Monday) 3:30pm

[Tam Nguyen Phan]

BINGHAMTON GEOMETRY/TOPOLOGY SEMINAR

   Date: Monday, November 9th, 2015

   Time:  3.30 pm

   Place: Whitney Hall, Room 100E,  followed by coffee/tea in the
      Hilton Reading Room. Note the new location of the math department (
http:// <http://www2.math.binghamton.edu/p/directions>www2.
<http://www2.math.binghamton.edu/p/directions>math.binghamton.edu
<http://www2.math.binghamton.edu/p/directions>/p/directions
<http://www2.math.binghamton.edu/p/directions>).

   Speaker: *Renato G. Bettiol* (University of Pennsylvania)

   Title:  *Positive biorthogonal curvature in dimension 4*

    Abstract: A 4-manifold is said to have positive biorthogonal curvature
if the average of sectional curvatures of any pair of orthogonal planes is
positive. In this talk, I will describe a construction of metrics with
positive biorthogonal curvature on the product of spheres, and then combine
it with recent surgery stability results of Hoelzel to classify (up to
homeomorphism) the closed simply-connected 4-manifolds that admit a metric
with positive biorthogonal curvature.

NOTE:  The seminar has a webpage where the semester's program is listed:

http://www2.math.binghamton.edu/p/seminars/topsem
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