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pro vyhledávání: '"Winkel, Jeroen"'
Given a non-singular action $\Gamma \curvearrowright (X,\mu)$, we define the $*$-algebra $\mathbb C_{\rm fp}[\Gamma \curvearrowright X]$ of operators of finite dynamical propagation associated with this action. This assignment is completely canonical
Externí odkaz:
http://arxiv.org/abs/2308.07006
Autor:
Tessera, Romain, Winkel, Jeroen
We investigate fixed point properties for isometric actions of topological groups on a wide class of metric spaces, with a particular emphasis on Hilbert spaces. Instead of requiring the action to be continuous, we assume that it is ``controlled", i.
Externí odkaz:
http://arxiv.org/abs/2212.04900
Autor:
Winkel, Jeroen
We show that a sequence of graphs with geometric property (T) has many small cycles. We also show that when a small part of a sequence of graphs with geometric property (T) is changed, it still has geometric property (T), provided that it is still an
Externí odkaz:
http://arxiv.org/abs/2203.01613
Autor:
Winkel, Jeroen
Geometric property (T) was defined by Willett and Yu, first for sequences of graphs and later for more general discrete spaces. Increasing sequences of graphs with geometric property (T) are expanders, and they are examples of coarse spaces for which
Externí odkaz:
http://arxiv.org/abs/2009.07339
We introduce and analyse a general notion of fundamental group for noncommutative spaces, described by differential graded algebras. For this we consider connections on finitely generated projective bimodules over differential graded algebras and sho
Externí odkaz:
http://arxiv.org/abs/1910.10127
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Autor:
Winkel, Jeroen
Publikováno v:
In Journal of Functional Analysis 15 October 2021 281(8)
Publikováno v:
Algebras & Representation Theory; Aug2022, Vol. 25 Issue 4, p1003-1035, 33p
Akademický článek
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