Belinskaya's Theorem for Measure-Preserving Flows
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Statement
Two free ergodic measure-preserving flows whose full groups are isomorphic as abstract groups are conjugate up to a scalar time change. This proves the flow analogue of Belinskaya's theorem, answering a question posed by François Le Maître and the author.
Context
Answers a question the author had posed with Le Maître, transferring a classical rigidity theorem from transformations to flows.
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The paper states that the criterion the proof turns on, and its application, were discovered autonomously by a two-agent AI system running GPT-5 and Claude Opus 4 in a research loop; Codex was used separately for proofreading and stylistic editing.
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