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The Ehrhart h*-polynomials of positroid polytopes (combinatorics seminar)
Yuhan Jiang (UC Berkeley)
A positroid is a matroid realized by a matrix such that all maximal minors are non-negative. Positroid polytopes are matroid polytopes of...
Sprout symmetric functions (Combinatorics Seminar)
Richard P. Stanley (MIT & U. Miami)
We will discuss certain sequences (R_0, R_1, ...) of symmetric functions that we call sprout symmetric functions. Many examples of...