feat: add Oppenheim inequality eval problem - #7
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Uses the newly formalized Schur product theorem (PosSemidef.hadamard) to state Oppenheim's 1930 inequality: det(A ⊙ B) ≥ det(A) · ∏ᵢ Bᵢᵢ for positive semidefinite matrices A, B. Bumps mathlib to include the Schur product theorem PR. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
sorry-d theorem statementTest plan
sorryshould be accepted)eval_inventorypicks up the new problem from manifests/problems.toml🤖 Prepared with Claude Code