Manuscript OpenAI@2026-10-07 · OpenAI.tex · remark · 6a931f8f

Remark: 363-02. Nonuniqueness for the periodic hard-sphere Boltzmann equation

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OpenAI@2026-10-07#rem:oai-p-363-02

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Authors: OpenAI. Family 363.

Title: Nonuniqueness for the periodic hard-sphere Boltzmann equation.

Abstract: We prove nonuniqueness for the periodic hard-sphere Boltzmann equation by constructing two distinct global renormalized solutions with the same nonnegative initial density on ${}mathbb T{}3{}times{}mathbb R{}3$. This density has bounded velocity support and finite mass, energy, and absolute entropy. Both solutions conserve local mass and total momentum and satisfy the global energy and entropy-dissipation inequalities. On a common initial interval, they are strongly continuous in L1, and their collision gains and losses are integrable.

This abstract is a catalogue record. It is not a verification and not a premise. It does not close O.1. O.1 stays NOT_CLOSED. No quantum coefficient is admitted. No compilation is asserted.

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