Tag
least-squares
- Aug 22, 2025 Least Squares as Orthogonal Projection onto a Design Matrix Why the normal equations are a geometric condition rather than an algebraic trick, what rank deficiency does to the answer, and why forming the Gram matrix costs half the digits. machine learning
- Mar 21, 2025 Householder QR and Orthogonality Loss in Gram-Schmidt Why the reflector-based factorization keeps its computed factors orthogonal when classical Gram-Schmidt does not, and what that costs in flops. scientific computing