Coincidences between homological densities, predicted by arithmetic
Coincidences between homological densities, predicted by arithmetic
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通过算术预测的同源密度之间的重合
DOI:
10.1016/j.aim.2019.06.016
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发表时间:
2019
影响因子:
1.7
通讯作者:
Wood, Melanie Matchett
中科院分区:
文献类型:
--
作者:
Farb, Benson;Wolfson, Jesse;Wood, Melanie Matchett
Motivated by analogies with basic density theorems in analytic number theory, we introduce a notion (and variations) of the homological density of one space in another. We use Weil's number field/function field analogy to predict coincidences for limiting homological densities of various sequences Z n (d 1,…, d m)(X) of spaces of 0-cycles on manifolds X. The main theorem in this paper is that these topological predictions, which seem strange from a purely topological viewpoint, are indeed true. One obstacle to proving such a theorem is the combinatorial complexity of all possible “collisions” of points. This problem does not arise in the simplest (and classical) case (m, n)=(1, 2) of configuration spaces. To overcome this obstacle we apply the Björner–Wachs theory of lexicographic shellability from algebraic combinatorics.
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