List questions from projection-matrices | MathQA

How to find the basis of a transformation matrix?

Published on 05 Jan 2023 - 9:15

Geometrically, why do we need independent columns in a matrix $A$ when computing the projection matrix onto the column space of $A$?

Published on 06 Jan 2023 - 2:08

Projection operator (redundant?) definition

Published on 27 Mar 2026 - 16:20

Decompose the identity matrix into several projection matrices. Prove the range of $P_j$ is the subset of the kernel of $P_i$

Published on 16 Jan 2023 - 9:51

Prove orthogonal projections for a matrix A and its transpose

Published on 22 Jan 2023 - 21:05

What is the correct way to connect the subspaces of a matrix to transpose vectors in the method of least squares?

Published on 25 Jan 2023 - 2:40

Are there non-identity matrices that fit the definition of $A^2 = A$?

Published on 28 Jan 2023 - 22:56