rioneye
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 Dec 4 awarded Notable Question Nov 9 awarded Popular Question Oct 18 awarded Popular Question Sep 30 awarded Popular Question Dec 18 awarded Yearling Nov 26 awarded Popular Question Nov 4 awarded Notable Question Jul 2 awarded Curious Mar 28 accepted Approximation to the square root Mar 28 asked Approximation to the square root Feb 21 awarded Popular Question Nov 8 comment Show that two matrices with the same eigenvalues are similar The one step that is a bit confusing, is the last one. You say that $y$ are the basis, but why does that mean they drop out of the equality? Nov 8 comment Show that two matrices with the same eigenvalues are similar Ok, that makes sense, though I think there is a misplaced equals sign when showing that $P$ is non singular Nov 8 accepted Show that two matrices with the same eigenvalues are similar Nov 7 asked Show that two matrices with the same eigenvalues are similar Oct 30 comment Show that $N(A^T A) \subset N(A)$ $Ab$ is orthogonal to itself which must mean that it equals zero. Is that right? Oct 30 asked Show that $N(A^T A) \subset N(A)$ Oct 29 revised Show that $\phi(B_n(1)) = B_n(r)$ added 27 characters in body Oct 29 comment Show that $\phi(B_n(1)) = B_n(r)$ For general $E \subset \mathbb R^n$ phi is defined as $\phi(E) = \lbrace \phi(x)\in \mathbb R^n: x\in E\rbrace$ Oct 29 asked Show that $\phi(B_n(1)) = B_n(r)$