arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.07851math.COmath.RT
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1324-和2143-回避Kazhdan-Lusztig固有量和k-正性

1324- and 2143-avoiding Kazhdan-Lusztig immanants and k-positivity

Sunita Chepuri, Melissa Sherman-Bennett

摘要:

内蕴式是方阵上的函数,推广了行列式和积和式。Kazhdan-Lusztig内禀函数由排列索引,涉及A型Kazhdan-Lusztig多项式的$q=1$特化,并在(Rhoades-Skandera,2006)中定义。利用Haiman,1993和Stembridge,1991的结果,Rhoades和Skandera证明了Kazhdan-Lusztig固有子式非负的矩阵上的Kazhdan-Lusztig固有子式非负。我们研究$k$ -正矩阵(大小为$k \times k$及更小的子式为正的矩阵)上哪些Kazhdan-Lusztig固有量为正。我们证明了当$v$避免1324和2143时,$v$索引的Kazhdan-Lusztig内禀在$k$ -正矩阵上是正的,并且对于$v$的所有非逆$i<j$,无论是$j-i \leq k$还是$v_j-v_i\leq k$。我们的主要工具是刘易斯·卡罗尔的身份。

英文摘要:

Immanants are functions on square matrices generalizing the determinant and permanent. Kazhdan-Lusztig immanants, which are indexed by permutations, involve $q=1$ specializations of Type A Kazhdan-Lusztig polynomials, and were defined in (Rhoades-Skandera, 2006). Using results of (Haiman, 1993) and (Stembridge, 1991), Rhoades and Skandera showed that Kazhdan-Lusztig immanants are nonnegative on matrices whose minors are nonnegative. We investigate which Kazhdan-Lusztig immanants are positive on $k$-positive matrices (matrices whose minors of size $k \times k$ and smaller are positive). We show that the Kazhdan-Lusztig immanant indexed by $v$ is positive on $k$-positive matrices when $v$ avoids 1324 and 2143 and for all non-inversions $i<j$ of $v$, either $j-i \leq k$ or $v_j-v_i\leq k$. Our main tool is Lewis Carroll's identity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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