Elliptic classes of Schubert varieties
Algebraic Geometry
2019-10-08 v1
Abstract
We introduce new notions in elliptic Schubert calculus: the (twisted) Borisov-Libgober classes of Schubert varieties in general homogeneous spaces G/P. While these classes do not depend on any choice, they depend on a set of new variables. For the definition of our classes we calculate multiplicities of some divisors in Schubert varieties, which were only known for full flag varieties before. Our approach leads to a simple recursions for the elliptic classes. Comparing this recursion with R-matrix recursions of the so-called elliptic weight functions of Rimanyi-Tarasov-Varchenko we prove that weight functions represent elliptic classes of Schubert varieties.
Cite
@article{arxiv.1910.02313,
title = {Elliptic classes of Schubert varieties},
author = {Shrawan Kumar and Richárd Rimányi and Andrzej Weber},
journal= {arXiv preprint arXiv:1910.02313},
year = {2019}
}
Comments
23 pages