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@misc{OAI:A-finite-entropy-system-without-a-smooth-positive-volume-model-September-25-2026,
  author = {{OpenAI}},
  title = {{A zero-entropy system without a smooth positive-volume model}},
  howpublished = {OpenAI Math Release preprint
                  \href{https://github.com/openai/math/blob/main/preprints/A-finite-entropy-system-without-a-smooth-positive-volume-model-September-25-2026/paper.pdf}{OAI:A-finite-entropy-system-without-a-smooth-positive-volume-model-September-25-2026}},
  year = {2026}
}