A differential complex for CAT(0) cubical spaces
A differential complex for CAT(0) cubical spaces
复制标题
CAT(0) 立方空间的微分复形
DOI:
10.1016/j.aim.2019.03.009
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发表时间:
2019
影响因子:
1.7
通讯作者:
Brodzki J
中科院分区:
文献类型:
--
作者:
Brodzki J
Abstract In the 1980's Pierre Julg and Alain Valette, and also Tadeusz Pytlik and Ryszard Szwarc, constructed and studied a certain Fredholm operator associated to a simplicial tree. The operator can be defined in at least two ways: from a combinatorial flow on the tree, similar to the flows in Forman's discrete Morse theory, or from the theory of unitary operator-valued cocycles. There are applications of the theory surrounding the operator to C⁎-algebra K-theory, to the theory of completely bounded representations of groups that act on trees, and to the Selberg principle in the representation theory of p-adic groups. The main aim of this paper is to extend the constructions of Julg and Valette, and Pytlik and Szwarc, to CAT (0) cubical spaces. A secondary aim is to illustrate the utility of the extended construction by developing an application to operator K-theory and giving a new proof of K-amenability for groups that act properly on finite dimensional CAT (0)-cubical spaces.
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影响因子:
1.4
作者:
Graham A. Niblo;M. Roller
通讯作者:
M. Roller
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
R. Forman
通讯作者:
R. Forman
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
T. Pytlik;R. Szwarc
通讯作者:
R. Szwarc
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
J. Cuntz
通讯作者:
J. Cuntz
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
P. Julg;A. Valette
通讯作者:
A. Valette