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math.CO2025
Positive specializations of K-theoretic Schur P- and Q-functions
Eric Marberg
Yeliussizov has classified the positive specializations of symmetric Grothendieck functions, defined in several different ways, providing a K-theoretic lift of the classical Edrei-…
math.RT2025
Classical double Grothendieck transitions
Eric Marberg
Kirillov and Naruse have constructed double Grothendieck polynomials to represent the equivariant K-theory classes of Schubert varieties in the complete flag manifolds of types B,…
math.RT2025
Brion atoms for classical types
Eric Marberg
Let be a classical group defined over the complex numbers with a Borel subgroup . Choose a holomorphic involution of and let be its set of fixed points. The group $K…