Residual-space Christoffel sampling with whitening makes random-feature PDE collocation systems well-conditioned while keeping sample complexity linear in the retained residual dimension.
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Residual-Christoffel Sampling for Random Feature Collocation of Linear PDEs
Residual-space Christoffel sampling with whitening makes random-feature PDE collocation systems well-conditioned while keeping sample complexity linear in the retained residual dimension.