Mathematics
daw
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Apparently, this user prefers to keep an air of mystery about them.

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22 Inner product on $C(\mathbb R)$ May 30 '14
18 Is every Hilbert space separable? Sep 28 '17
15 Is KKT conditions necessary and sufficient for any convex problems? Nov 10 '17
14 Orthogonal Projection of $ z $ onto the Affine set $ \left\{ x \mid A x = b \right\} $ Jun 10 '15
13 Ensuring that a symmetric matrix with nonnegative elements is positive semidefinite May 7 '15
13 How to show that $A^2=AB+BA$ implies $\det(AB-BA)=0$ for $3\times3$ matrices? Jan 26 '15
12 Using the Bolzano's theorem to prove that exists only one solution in the interval. Jun 16 '14
12 Union of closed convex sets May 17
10 Proving or disproving matrix $A+B$ is invertible Oct 14 '14
10 Prove set $\left\{(x,y)\in\mathbb R^{2} : \frac{x^2}{4}+\frac{y^2}{9}<1\right\}$ is open Aug 13 '15
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