V2EX kostka number

Kostka Number

定义 Definition

Kostka number(科斯特卡数)是组合数学与表示论中的一个计数数值,常记为 \(K_{\lambda,\mu}\)。它表示:在给定形状(shape)为分拆 \(\lambda\)、权重/内容(weight/content)为 \(\mu\) 的条件下,半标准杨表(semistandard Young tableaux)的个数。它也出现在对称函数理论中,用来描述如 Schur 函数单项式对称函数之间的系数关系。

发音 Pronunciation

/kstk nmbr/

例句 Examples

The Kostka number \(K_{\lambda,\mu}\) counts semistandard Young tableaux of shape \(\lambda\) and weight \(\mu\).
科斯特卡数 \(K_{\lambda,\mu}\) 用来计数形状为 \(\lambda\)、权重为 \(\mu\) 的半标准杨表。

In symmetric function theory, Kostka numbers appear as coefficients when expressing Schur functions in the monomial basis.
在对称函数理论中,把 Schur 函数用单项式对称函数基展开时,科斯特卡数会作为系数出现。

词源 Etymology

“Kostka number”以波兰数学家 Kazimierz Koska(卡齐米日科斯特卡,18421903)命名;该术语用于纪念他在与杨表、分拆及相关组合计数问题上的贡献。

相关词 Related Words

文学与经典用例 Literary Works

  • Symmetric Functions and Hall Polynomials I. G. Macdonald
  • Enumerative Combinatorics, Volume 2 Richard P. Stanley
  • Young Tableaux: With Applications to Representation Theory and Geometry William Fulton
  • The Symmetric Group: Representations, Combinatorial Algorithms, and Symmetric Functions Bruce E. Sagan
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