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 Jun 5 awarded Popular Question Feb 1 awarded Popular Question Sep 17 comment How to Solve or LinearSolve $A = I$ matrix equation? The question related to finding the left inverse of some matrix $A$. But a solution I found from my linear algebra course is to use Gaussian elim. (RowReduce) with the augmented matrix $[A I]$. Sep 17 comment How to Solve or LinearSolve $A = I$ matrix equation? @Artes Sorry I have been away and thanks for your answer. Sep 17 accepted How to Solve or LinearSolve $A = I$ matrix equation? Sep 10 awarded Critic Sep 8 asked How to Solve or LinearSolve $A = I$ matrix equation? Sep 8 awarded Nice Question Sep 8 accepted Mathematica for linear algebra course? Sep 8 revised Mathematica for linear algebra course? added 113 characters in body Sep 8 asked Mathematica for linear algebra course? Sep 8 accepted Need help evaluating definite integral to a function of Y Sep 6 revised Need help evaluating definite integral to a function of Y added 24 characters in body Sep 6 comment Need help evaluating definite integral to a function of Y Yes, it is independent of $u$. That's a good point, I will just need to make sure it would be valid for this problem, and should have included that $Y = \sqrt{2T}\cos(U)$, and will do so now. Sep 6 asked Need help evaluating definite integral to a function of Y Sep 4 comment How can I completely ban usage of some functions in output and mandate use of others? but note that it's up to you to know that the replacement is equivalent. Sep 4 awarded Teacher Sep 4 answered How can I completely ban usage of some functions in output and mandate use of others? Aug 28 revised How to change the style definitions for Default.nb? deleted 216 characters in body Aug 28 awarded Editor