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math.CO2021
Counting weighted maximal chains in the circular Bruhat order
Gopal Goel, Olivia McGough, David Perkinson
The totally nonnegative Grassmannian is the subset of the real Grassmannian consisting of points with all nonnegative Plücker coordina…
math.CO2018
Critical groups of iterated cones
Gopal Goel, David Perkinson
Let G be a finite graph, and let G_n be the n-th iterated cone over G. We study the structure of the critical group of G_n arising in divisor and sandpile theory.