Seminar series
Date
Mon, 18 Nov 2024
15:30
Location
L5
Speaker
Nicholas Proudfoot
Organisation
University of Oregon

June Huh proved in 2012 that the Betti numbers of the complement of a complex hyperplane arrangement form a log concave sequence.  But what if the arrangement has symmetries, and we regard the cohomology as a representation of the symmetry group?  The motivating example is the braid arrangement, where the complement is the configuration space of n points in the plane, and the symmetric group acts by permuting the points.  I will present an equivariant log concavity conjecture, and show that one can use representation stability to prove infinitely many cases of this conjecture for configuration spaces.
 

Last updated on 30 Sep 2024, 8:47am. Please contact us with feedback and comments about this page.