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首页> 外文期刊>Journal of algebra and its applications >Polar degrees and closest points in codimension two
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Polar degrees and closest points in codimension two

机译:极地度和Codimension两个最近的点

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摘要

Suppose that X-A subset of Pn-1 is a toric variety of codimension two defined by an (n - 2) x a integer matrix A, and let B be a Gale dual of A. In this paper, we compute the Euclidean distance degree and polar degrees of X-A (along with other associated invariants) combinatorially working from the matrix B. Our approach allows for the consideration of examples that. would be impractical using algebraic or geometric methods. It also yields considerably simpler computational formulas for these invariants, allowing much larger examples to be computed much more quickly than the analogous combinatorial methods using the matrix A in the codimension two case.
机译:假设PN-1的Xa子集是由(n - 2)xa整数矩阵A限定的两种成分系数,并且让B是A的大风双重。在本文中,我们计算了欧几里德距离度和极性 组合来自矩阵B的XA度(以及其他相关的不变性)。我们的方法允许考虑实施例。 使用代数或几何方法是不切实际的。 它还为这些不变量产生了相当更简单的计算公式,允许比编纂中的矩阵A中的类似组合方法更快地计算更大的示例。

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