Finitely Summable $K$-homology, the Index Pairing, and Cantor Minimal Systems
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918039200464896 |
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| author | Lorenzo, Levi |
| author_facet | Lorenzo, Levi |
| contents | We study index pairings for crossed-product $C^*$-algebras arising from minimal actions on the Cantor set. We utilize Putnam's orbit-breaking AF-subalgebras and embeddings to show we can compute any index pairing for Cantor minimal system crossed products using Connes' trace formulas. In the case of odometers, we show that the associated algebras have uniformly finitely summable $K$-homology. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_24135 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Finitely Summable $K$-homology, the Index Pairing, and Cantor Minimal Systems Lorenzo, Levi Operator Algebras K-Theory and Homology 19K33, 19K56 We study index pairings for crossed-product $C^*$-algebras arising from minimal actions on the Cantor set. We utilize Putnam's orbit-breaking AF-subalgebras and embeddings to show we can compute any index pairing for Cantor minimal system crossed products using Connes' trace formulas. In the case of odometers, we show that the associated algebras have uniformly finitely summable $K$-homology. |
| title | Finitely Summable $K$-homology, the Index Pairing, and Cantor Minimal Systems |
| topic | Operator Algebras K-Theory and Homology 19K33, 19K56 |
| url | https://arxiv.org/abs/2505.24135 |