Jason
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 Apr 6 comment Trying to solve $A^TA = B$ where $B$ is known why do you need vector a? To fill out the rows and make it a square matrix? and the $\Sigma^{1/2}$ is just the square root of the eigenvalues along the main diagonal? Apr 6 accepted Trying to solve $A^TA = B$ where $B$ is known Apr 5 asked Trying to solve $A^TA = B$ where $B$ is known Jan 21 comment Can a continuous function on [0,1] be constructed which is differentiable exactly at two points in [0,1]? how can a function be continuous everywhere and differentiable nowhere? Does such a function exist? Feb 26 accepted Solve Multivariate Polynomial Feb 3 asked Solve Multivariate Polynomial Jan 30 awarded Tumbleweed Jan 20 awarded Scholar Jan 20 awarded Supporter Jan 20 accepted Solve Matrix Equations Jan 20 comment Solve Matrix Equations This is great. How do I choose X and Y? Jan 20 comment Solve Matrix Equations I think I can figure out my second question (en.wikipedia.org/wiki/…), but how do I solve for PI? Jan 20 comment Solve Matrix Equations Thanks! Two questions: how do I solve for pi? it's also unknown. How do I calculate the Moore-Penrose psuedo-inverse? Jan 20 awarded Student Jan 20 asked Solve Matrix Equations