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math.CO2025
Combinatorial proofs of the type A quiver component formulas
Aidan Lindberg, Jenna Rajchgot
The K-theoretic quiver component formula expresses the K-polynomial of a type A quiver locus as an alternating sum of products of double Grothendieck polynomials. This formula was…
math.CO2022★ 4 cited
Castelnuovo-Mumford regularity of ladder determinantal varieties and patches of Grassmannian Schubert varieties
Jenna Rajchgot, Colleen Robichaux, Anna Weigandt
We give degree formulas for Grothendieck polynomials indexed by vexillary permutations and -avoiding permutations via tableau combinatorics. These formulas generalize a formu…
math.CO2019
Degrees of symmetric Grothendieck polynomials and Castelnuovo-Mumford regularity
Jenna Rajchgot, Yi Ren, Colleen Robichaux +2
We give an explicit formula for the degree of the Grothendieck polynomial of a Grassmannian permutation and a closely related formula for the Castelnuovo-Mumford regularity of the…