k-Schur expansions of Catalan functions
k-Schur expansions of Catalan functions
复制标题
加泰罗尼亚函数的 k-Schur 扩展
DOI:
10.1016/j.aim.2020.107209
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发表时间:
2020
影响因子:
1.7
通讯作者:
Summers, Daniel
中科院分区:
文献类型:
--
作者:
Blasiak, Jonah;Morse, Jennifer;Pun, Anna;Summers, Daniel
We make a broad conjecture about the k-Schur positivity of Catalan functions, symmetric functions which generalize the (parabolic) Hall-Littlewood polynomials. We resolve the conjecture with positive combinatorial formulas in cases which address the k-Schur expansion of (1) Hall-Littlewood polynomials, proving the q= 0 case of the strengthened Macdonald positivity conjecture from [24];(2) the product of a Schur function and a k-Schur function when the indexing partitions concatenate to a partition, describing a class of Gromov-Witten invariants for the quantum cohomology of complete flag varieties;(3) k-split polynomials, solving a substantial special case of a problem of Broer and Shimozono-Weyman on parabolic Hall-Littlewood polynomials [37]. In addition, we prove the conjecture that the k-Schur functions defined via k-split polynomials [25] agree with those defined in terms of strong tableaux [21].
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影响因子:
1
作者:
J. Morse;A. Schilling
通讯作者:
A. Schilling
影响因子:
3.9
作者:
J. Blasiak;J. Morse;Anna Y. Pun;D. Summers
通讯作者:
D. Summers
DOI:
10.4310/joc.2012.v3.n3.a5
发表时间:
2012
期刊:
The Journal of Combinatorics
影响因子:
--
作者:
Sami H. Assaf;Sara C. Billey
通讯作者:
Sara C. Billey
影响因子:
0.8
作者:
A. Buch;A. Kresch;K. Purbhoo;Harry Tamvakis
通讯作者:
Harry Tamvakis
DOI:
10.4310/mrl.2012.v19.n1.a7
发表时间:
2010
期刊:
arXiv: Combinatorics
影响因子:
--
作者:
T. Lam;M. Shimozono
通讯作者:
M. Shimozono