Cartan subalgebras of C*-algebras associated with iterated function systems

Kei Ito

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arXiv · 2501.04127

Cartan subalgebras of C*-algebras associated with iterated function systems

Kei Ito

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Abstract

Let $X$ be a compact Hausdorff space, and let $\gamma$ be an iterated function system on $X$. Kajiwara and Watatani showed that if $\gamma$ is self-similar and satisfies the open set condition and some additional technical conditions, $C(X)$ is a maximal abelian subalgebra of the Kajiwara--Watatani algebra $\O_\gamma$ associated with $\gamma$. In this paper, we extend their results by providing sufficient conditions under which $C(X)$ becomes a Cartan subalgebra of $\O_\gamma$. Additionally, we present sufficient conditions under which $C(X)$ fails to be a masa of $\O_\gamma$.

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BibTeX RIS

Kei Ito. 2025-01-07. Cartan subalgebras of C*-algebras associated with iterated function systems. https://arxiv.org/abs/2501.04127

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