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simd: PowerSums::checked_merge + CrossPowerSums fold; CovHighD::from_symmetric_fn - #338

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AdaWorldAPI merged 3 commits into

ccr-1d39fce9-gdgy6k

Oct 4, 2026

Commits on Sep 30, 2026

simd: PowerSums::checked_merge — combine per-chunk power sums without wrapping
claude
committed
1d876f2
simd: joint power sums fold (n, Σx, Σy, Σx², Σy², Σxy) on the visitor walker
claude
committed
c56f9c2
pillar/cov_high_d: from_symmetric_fn + pub get; test sandwich with non-identity M
claude
committed
a62add4