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arXiv 1402.0892math.COmath.AG
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阶乘P-和Q-Schur函数表示等变量子Schubert类

Factorial P- and Q-Schur functions represent equivariant quantum Schubert classes

Takeshi Ikeda, Leonardo C. Mihalcea, Hiroshi Naruse

摘要:

我们发现介绍发电机和关系的等变量子上同调环的最大各向同性Grassmannian类型的B,C和D,我们发现多项式代表舒伯特类在这些环。这些代表给出了相同的Pfweian公式出现在阶乘$P$ -和$Q$ -舒尔函数的理论。在专门等变上同调,我们解释由此产生的演示文稿和Pfavian公式陈类重言式丛。

英文摘要:

We find presentations by generators and relations for the equivariant quantum cohomology rings of the maximal isotropic Grassmannians of types B,C and D, and we find polynomial representatives for the Schubert classes in these rings. These representatives are given in terms of the same Pfaffian formulas which appear in the theory of factorial $P$- and $Q$-Schur functions. After specializing to equivariant cohomology, we interpret the resulting presentations and Pfaffian formulas in terms of Chern classes of tautological bundles.

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