Staircase skew Schur functions are Schur P-positive

Staircase skew Schur functions are Schur P-positive
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阶梯偏斜 Schur 函数为 Schur P 正函数

DOI:
10.1007/s10801-012-0342-8
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发表时间:
2011
影响因子:
0.8
通讯作者:
Luis G. Serrano
Luis G. Serrano
中科院分区:
数学3区
文献类型:
--
作者:
Federico Ardila;Luis G. Serrano

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证明了Stanley猜想:若δn为阶梯形,则斜Schur函数s_{\delta_{n} / \mu}$是Schur P-函数的非负和.我们证明,在这个总和的系数计数移位形状的某些填充。特别地,对于斜Schur函数s_{\delta_{n} / \delta _{n-2}},我们讨论了它与欧拉数和交替排列的关系.
We prove Stanley’s conjecture that, if δn is the staircase shape, then the skew Schur functions $s_{\delta_{n} / \mu}$ are non-negative sums of Schur P-functions. We prove that the coefficients in this sum count certain fillings of shifted shapes. In particular, for the skew Schur function $s_{\delta_{n} / \delta _{n-2}}$, we discuss connections with Eulerian numbers and alternating permutations.