Polynomial-Factor Hardness for the Closest Vector Problem
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Statement
Is the closest vector problem NP-hard to approximate within polynomial factors ? Yes for some : hardness of approximation reaches polynomial factors, with consequences for decoding and related lattice problems - a foundational question underpinning post-quantum cryptography where hardness had stalled at almost-polynomial factors since the late 1990s.
Context
Approximation hardness for CVP is a foundational lattice question tied to post-quantum cryptography; progress had stalled at almost-polynomial factors since the late 1990s.
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Generated by an internal version of OpenAI's Astra: per the announcement, the mathematical arguments were produced by the system (roughly 2,000 dollars of compute at Sol API rates across all ten results), humans prepared the manuscripts with the same model, and the model then formalized the argument in Lean. A narrated reasoning walkthrough is published for each result.
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Machine check · not human verification
machine: correctscope Lean formalization of the result
Kernel-checked Lean 4 certificate in OpenAI's public ten-proofs repository (Lean 4.32, mathlib,
lake build All), with an independent Comparator checking route. Statement fidelity and community review of the day-old company announcement remain pending, hence candidate status.No ProbXiv account is credited for this check. Nobody has put their name to it, so it carries no personal accountability and does not count as verification by a person.
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