arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.00112math.COmath.AG
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拟阵态射的K理论Tutte多项式

K-theoretic Tutte polynomials of morphisms of matroids

Rodica Dinu, Christopher Eur, Tim Seynnaeve

摘要:

通过旗簇的K-理论,我们将拟阵的Tutte多项式推广到拟阵的态射。我们介绍了两种不同的推广,并证明了每一个都有自己的优点,其中的权衡是组合学和几何学的易用性之间。一个推广恢复Las Vergnas Tutte多项式的态射的拟阵,其中承认一个corank零公式和删除压缩递归。另一个概括则没有,但更好地反映了旗形品种的几何形状。

英文摘要:

We generalize the Tutte polynomial of a matroid to a morphism of matroids via the K-theory of flag varieties. We introduce two different generalizations, and demonstrate that each has its own merits, where the trade-off is between the ease of combinatorics and geometry. One generalization recovers the Las Vergnas Tutte polynomial of a morphism of matroids, which admits a corank-nullity formula and a deletion-contraction recursion. The other generalization does not, but better reflects the geometry of flag varieties.

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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