The Walker conjecture for chains in ℝd

The Walker conjecture for chains in ℝd
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ℝd 中链的沃克猜想

DOI:
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发表时间:
2011
影响因子:
0.8
通讯作者:
D. Schütz
D. Schütz
中科院分区:
数学2区
文献类型:
--
作者:
M. Farber;J. Hausmann;D. Schütz

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摘要链是由长度为1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,. ., n-1个连续连接的点,使得所得的虚线连接距离为n的两个给定点。对于一个固定的长度参数的一般集合,所有链的空间是一个闭的光滑流形,维数为(n − 2)(d − 1)− 1。本文研究链空间的上同调代数。我们给出了这些空间的一个完整的分类(直到等变同同态)的一种特殊类型的线性不等式,满足的长度参数φ 1,。. .,你好这个结果类似于K.步行者,它涉及特殊情况d=2。
Abstract A chain is a configuration in ℝd of segments of length ℓ1, . . ., ℓn−1 consecutively joined to each other such that the resulting broken line connects two given points at a distance ℓn. For a fixed generic set of length parameters the space of all chains in ℝd is a closed smooth manifold of dimension (n − 2)(d − 1) − 1. In this paper we study cohomology algebras of spaces of chains. We give a complete classification of these spaces (up to equivariant diffeomorphism) in terms of linear inequalities of a special kind which are satisfied by the length parameters ℓ1, . . ., ℓn. This result is analogous to the conjecture of K. Walker which concerns the special case d=2.