Catalan functions and ?-Schur positivity
Catalan functions and ?-Schur positivity
复制标题
加泰罗尼亚函数和 ?-Schur 正性
DOI:
10.1090/jams/921
复制
发表时间:
2018
影响因子:
3.9
通讯作者:
D. Summers
中科院分区:
文献类型:
--
作者:
J. Blasiak;J. Morse;Anna Y. Pun;D. Summers
We prove that graded
k
k
-Schur functions are
G
G
-equivariant Euler characteristics of vector bundles on the flag variety, settling a conjecture of Chen-Haiman. We expose a new miraculous shift invariance property of the graded
k
k
-Schur functions and resolve the Schur positivity and
k
k
-branching conjectures in the strongest possible terms by providing direct combinatorial formulas using strong marked tableaux.