Functorial invariants of trees and their cones
Functorial invariants of trees and their cones
复制标题
树及其锥体的函数不变量
DOI:
10.1007/s00029-019-0509-4
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Ramos, Eric
中科院分区:
文献类型:
--
作者:
Proudfoot, Nicholas;Ramos, Eric
We study the category whose objects are trees (with or without roots) and whose morphisms are contractions. We show that the corresponding contravariant module categories are locally Noetherian, and we study two natural families of modules over these categories. The first takes a tree to a graded piece of the homology of its unordered configuration space, or to the homology of the unordered configuration space of its cone. The second takes a tree to a graded piece of the intersection homology of the reciprocal plane of its cone, which is a vector space whose dimension is given by a Kazhdan–Lusztig coefficient. We prove finite generation results for each of these modules, which allow us to draw conclusions about the growth of Betti numbers of configuration spaces and of Kazhdan–Lusztig coefficients of graphical matroids.
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影响因子:
0.7
作者:
Chettih;Safia;Luetgehetmann;Daniel
通讯作者:
Daniel
影响因子:
0.4
作者:
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通讯作者:
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DOI:
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发表时间:
2019
期刊:
Selecta Mathematica
影响因子:
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作者:
Ramos, Eric;White, Graham
通讯作者:
White, Graham
DOI:
--
发表时间:
2017
期刊:
影响因子:
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作者:
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通讯作者:
Benjamin Young
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
N. Proudfoot;Benjamin Young
通讯作者:
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