Gaussian interacting particles in Bures–Wasserstein geometry — reproduction

arXiv:2601.00632v1 · OpenReview IQojX8HugF

ClaimVerdictHeadline
1 LBW closed-form barycenterreproducedexact to 1e−14; BW needs ~12 iters, LBW 0 (87× faster)
2 CBO particle systemreproducedmatches a literal per-particle implementation exactly
3 Theorem 4.1 → global minimizersfalsifiedgives a near-optimal energy bound; σ=5 breaks C₁>0
4 Lemma 4.1 under local Lipschitzfalsifiedassumes growth-weighted Lipschitz; ratio unbounded
5 CBO beats BWGF on A–DfalsifiedCBO loses on B (+0.107) and D (+0.060)
6 Extended exp map preserves PSDreproduced20k draws, 68% outside the cone, all PSD