Mathematics
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daw
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Score Newest
question
23
Inner product on $C(\mathbb R)$
May 30, 2014
answer
18
Is every Hilbert space separable?
Sep 28, 2017
answer
15
Orthogonal Projection of $ z $ onto the Affine set $ \left\{ x \mid A x = b \right\} $
Jun 10, 2015
answer
15
Is KKT conditions necessary and sufficient for any convex problems?
Nov 10, 2017
answer
13
Ensuring that a symmetric matrix with nonnegative elements is positive semidefinite
May 7, 2015
answer
13
How to show that $A^2=AB+BA$ implies $\det(AB-BA)=0$ for $3\times3$ matrices?
Jan 26, 2015
answer
12
Using the Bolzano's theorem to prove that exists only one solution in the interval.
Jun 16, 2014
answer
12
Union of closed convex sets
May 17, 2021
answer
10
Proving or disproving matrix $A+B$ is invertible
Oct 14, 2014
answer
10
Linear independence of generalized eigenvectors
Nov 27, 2014
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Prime number snake (2)
17
Knights attacking exactly three knights
11
Queens attacking exactly four queens
9
Alice, Bob and Charlie know the sum, product and the difference between two numbers
7
Is a sign-preserving operator on $L^2$ a multiplication?

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