摘要翻译：
本文证明了Niederhausen（Catlan Traffic at the Beach,the Electronic Journal of Combinatorics,9,（2002）,1--17）研究的路径枚举问题中的某些数是复射影(n+1)-空间中线的Grassmannian的上同调环上的顶交数。
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英文标题：
《Catalan Traffic and Integrals on the Grassmannians of Lines》
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作者：
Taise Santiago Costa Oliveira
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最新提交年份：
2007
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分类信息：

一级分类：Mathematics        数学
二级分类：Algebraic Geometry        代数几何
分类描述：Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology
代数簇，叠，束，格式，模空间，复几何，量子上同调
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英文摘要：
  We prove that certain numbers occurring in a problem of paths enumeration, studied by Niederhausen (Catlan Traffic at the Beach, The Electronic Journal of Combinatorics, 9, (2002), 1--17), are top intersection numbers in the cohomology ring of the grassmannians of the lines in the complex projective (n+1)-space.
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PDF链接：
https://arxiv.org/pdf/0704.2376