Elliptic classes of Schubert varieties via Bott–Samelson resolution
Elliptic classes of Schubert varieties via Bott–Samelson resolution
复制标题
通过 Bott-Samelson 解析得到舒伯特簇的椭圆类
作者:
Richárd Rimányi;Andrzej Weber
Based on recent advances on the relation between geometry and representation theory, we propose a new approach to elliptic Schubert calculus. We study the equivariant elliptic characteristic classes of Schubert varieties of the generalized full flag variety G/B . For this first we need to twist the notion of elliptic characteristic class of Borisov–Libgober by a line bundle, and thus allow the elliptic classes to depend on extra variables. Using the Bott–Samelson resolution of Schubert varieties we prove a BGG‐type recursion for the elliptic classes, and study the Hecke algebra of our elliptic BGG operators. For G=GLn(C) we find representatives of the elliptic classes of Schubert varieties in natural presentations of the K theory ring of G/B , and identify them with the Tarasov–Varchenko weight function. As a byproduct we find another recursion, different from the known R‐matrix recursion for the fixed point restrictions of weight functions. On the other hand the R‐matrix recursion generalizes for arbitrary reductive group G .
DOI:
10.3842/sigma.2019.093
发表时间:
2019
期刊:
Integrability and Geometry: Methods and Applications
影响因子:
--
作者:
Rimányi, Richárd;Smirnov, Andrey;Varchenko, Alexander;Zhou, Zijun
通讯作者:
Zhou, Zijun
DOI:
10.1007/s00029-019-0451-5
发表时间:
2019
期刊:
Selecta Mathematica
影响因子:
--
作者:
Rimányi, R.;Tarasov, V.;Varchenko, A.
通讯作者:
Varchenko, A.
DOI:
10.3842/sigma.2018.132
发表时间:
2018
期刊:
Integrability and Geometry: Methods and Applications
影响因子:
--
作者:
Felder, Giovanni;Rimány, Richárd;Varchenko, Alexander
通讯作者:
Varchenko, Alexander