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arXiv math/9909089math.COmath.AG
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关于簇的一个简化公式

On a conjectured formula for quiver varieties

Anders S. Buch

摘要:

在我们与W. Fulton(math.AG/9804041)的方法,我们证明了一个关于簇的上同调类的公式.这个公式涉及一类新的广义Littlewood-Richardson系数,所有这些系数都令人惊讶地似乎是非负的。我们推测这些系数中的每一个都计算满足某些条件的半标准杨场景序列的数量。本文在一个特殊的情形下证明了这个猜想,其中n-簇最多可由四个向量丛描述。我还证明,一般猜想如下从一个简单的组合声明,大量的计算机验证已获得。

英文摘要:

In our joint paper with W. Fulton (math.AG/9804041) we prove a formula for the cohomology class of a quiver variety. This formula involves a new class of generalized Littlewood-Richardson coefficients, all of which surprisingly seem to be non-negative. We conjecture that each of these coefficients count the number of sequences of semistandard Young tableaux which satisfy certain conditions. In this paper I give a proof of this conjecture in the special case where the quiver variety can be described by at most four vector bundles. I also prove that the general conjecture follows from a simple combinatorial statement for which substantial computer verification has been obtained.

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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