- Full-rank random 5x5 (cond ~11.5) - Rank-deficient 5x5 (exact rank 3, noise-level tail sigmas) - Wide dynamic range 5x5 (cond ~9000, diagonal decay 50 -> 1e-3) - Symmetric indefinite 5x5 (sigma = |eigenvalues|)
- Full-rank random 5x5 (cond ~11.5) - Rank-deficient 5x5 (exact rank 3, noise-level tail sigmas) - Wide dynamic range 5x5 (cond ~9000, diagonal decay 50 -> 1e-3) - Symmetric indefinite 5x5 (sigma = |eigenvalues|)