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72,191
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# 72,191 Reputation

20 today
 +10 2 hours ago upvote Calculating the characteristic polynomial +10 4 hours ago upvote What is the radius of a circle given two points and the center of the circle is perpendicular to one of the points?
180 yesterday
 +25 12:36 2 events Converse of Schur's Lemma in finite dimensional vector spaces +25 06:11 2 events A non-strict inequality on skew symmetric matrices +20 22:04 2 events Matrix equation A*B=A +15 20:54 accept Why does SVD provide the least squares solution to $Ax=b$? +15 17:46 accept Spectral theorem for diagonlizable matrices +15 12:40 accept Q. Normal operator and properties +15 11:37 accept If $f(x) = cf(cx)%, show that %f(x)$ is inversely proportional to $x$ +10 21:09 upvote On composition with vec operation +10 19:23 upvote preservation of extreme points under linear transformation +10 09:01 upvote Matrices that are invariant under a change of basis +10 03:58 upvote Can we get $\|A^\dagger x-B^{-1}x\|_2\leq \epsilon \|B^{-1}x\|_2$? +10 01:40 upvote Why is it valid to multiply both sides of an equation by its complex conjugate?
165 2 days ago
 +45 17:19 4 events Growth of the set $\lbrace 2^n+3^m \rbrace$ in the integers +25 10:01 2 events Two real symmetric matrices are congruent if and only if they have the same rank and signature. +25 02:01 2 events Limit of fibonacci sequence +10 22:20 upvote Deriving the Hessian from the limit definition of the derivative +10 20:30 upvote Why does every number of shape ababab is divisible by $13$? +10 20:15 upvote Converse of Schur's Lemma in finite dimensional vector spaces +10 19:58 upvote Why does SVD provide the least squares solution to $Ax=b$? +10 17:14 upvote Matrices that are invariant under a change of basis +10 16:34 upvote Can we get $\|A^\dagger x-B^{-1}x\|_2\leq \epsilon \|B^{-1}x\|_2$? +10 16:11 upvote Show that $A=0 \iff \mathrm{tr}(A)=0$ where $A= M_1+ \cdots +M_{\ell}$. +10 14:23 upvote Spectral theorem for diagonlizable matrices -10 17:52 removed User was removed (learn more)
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