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Questions about the properties of vector spaces and linear transformations, including linear systems in general.

4 votes
0 answers
380 views

Pseudoinverse of column submatrix, from pseudoinverse of entire matrix.

Hello, I am working on a numerical method for the least-squares solution of a linear system. I know that I can approximate the solution to $Ax=b$ with $x=A^+b$, where $A^+$ is the Moore-Penrose pseu …