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Statement

Let μ\mu be a probability measure on the unit circle with Verblunsky coefficients α\alpha. Lukic conjectured that a weighted entropy condition with finitely many critical points is equivalent to a decomposition of α\alpha into components localized at those points. A counterexample with two critical points of multiplicity three refutes it: the sequence satisfies the decomposition conditions while the corresponding weighted entropy is −∞-\infty.

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  1. construction · #1

    GPT-5.6, with Jun Yan

    The record says a model found this and names the people who worked on it. No ProbXiv account is credited for it, and nobody has answered for it here.

    AI involvement
    ai discovered
    — the result was found by a model.

    The counterexample - two phase modes with common power-decay exponent 3/203/20 - was found by GPT-5.6, as the abstract states directly; the author developed and verified the construction.

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