feat: add entrywise exponential PSD eval problem - #5
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Uses the newly formalized Schur product theorem (PosSemidef.hadamard) to state that the entrywise exponential of a PSD matrix is PSD (Schoenberg 1942, Schur-Polya-Loewner theory). 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
posSemidef_map_exp: the entrywise exponential of a PSD matrix is PSD (Schoenberg 1942, Schur-Polya-Loewner theory)v4.30.0-rc1to50d5513e83cto include the Schur product theorem (PosSemidef.hadamard)Test plan
.leanfile without errors (the theorem body issorry)eval_inventorylists the new problem🤖 Prepared with Claude Code