UW Combinatorics Talk
Title: Matrix orbit closures and equivariant K-theory
Andrew Berget
University of Washington
April 9, 2:30pm
Padelford C-36 (this talk is part of the algebra seminar)
refreshments at 3:30pm
ABSTRACT
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Abstract: A matrix orbit closure is the Zariski closure of a
(GL_r x T^n)-orbit in the space of r-by-n matrices. I will discuss the
class of such a variety in the equivariant K-theory of the space of
matrices. Any such class is determined by surprising little combinatorial
data: a matroid. This will be viewed as a shadow of the connection
between the equivariant K-theory of the space of matrices, and that of
the Grassmannian. No prior knowledge of K-theory or matroids will be
presumed.
This is joint work with Alex Fink.
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Speaker's Contact Info:
Matrix orbit closures and equivariant K-theory
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