Recorded 12 February 2025. Colleen Robichaux of the University of California, Los Angeles, presents "Deciding positivity of Schubert coefficients" at IPAM's Computational Interactions between Algebra, Combinatorics, and Discrete Geometry Workshop. Abstract: Schubert coefficients are nonnegative integers that arise in Algebraic Geometry and play a central role in Algebraic Combinatorics. It is a major open problem whether they have a combinatorial interpretation, i.e., they are in #P. In this talk we discuss the closely related problem of the positivity of Schubert coefficients. We prove a positive rule for this problem based on two standard assumptions. This is joint work with Igor Pak. Learn more online at: https://www.ipam.ucla.edu/programs/workshops/computational-interactions-between-algebra-combinatorics-and-discrete-geometry/