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most citedThe Logic of Cardinality Comparison Without the Axiom of Choice

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math.GN2024

The homeomorphisms of the Sierpiński carpet are not classifiable by countable structures

Dhruv Kulshreshtha, Aristotelis Panagiotopoulos

We show that the homeomorphisms of the Sierpiński carpet are not classifiable, up to conjugacy, using isomorphism types of countable structures as invariants.