Billey-Type Formula for KL-Schubert Classes in Hyperbolic Cohomology

Cristian Lenart, Krista Zehr, Changlong Zhong

This paper studies the KL-Schubert classes defined by Kazhdan-Lusztig bases in $K$-theory and hyperbolic cohomology of flag varieties. We first establish Poincaré dualities of the…