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math.CO2024
Degrees of P-Grothendieck polynomials and regularity of Pfaffian varieties
Oliver Pechenik, Matthew St. Denis
We prove a formula for the degrees of Ikeda and Naruse's -Grothendieck polynomials using combinatorics of shifted tableaux. We show this formula can be used in conjunction with…
math.CO2024★ 3 cited
Web bases in degree two from hourglass plabic graphs
Christian Gaetz, Oliver Pechenik, Stephan Pfannerer +2
Webs give a diagrammatic calculus for spaces of -tensor invariants, but intrinsic characterizations of web bases are only known in certain cases. Recently, we…