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Answers
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16
Is the space of Hankel operators complemented in B(H)?
13
How to prove a unit norm matrix is the average of two unitary matrix
13
The probability for a symmetric matrix to be positive definite
12
Question on eigenvalue square root subadditivity
11
Von Neumann algebra associated to the infinite Cuntz algebra
10
“Explicit” embedding of $\ell^1$ as a closed subalgebra of a direct sum of matrix algebras
10
Zero sum of binomial coefficients
9
Critical Radius for Infinite Dimensional Sphere Packing
9
Some questions concerning a random number process
7
Subspace of $L^2$ that lies in $L^\infty$
7
Matrix inversion lemma with pseudoinverses
7
Ask the validity of a scalar inequality
7
Probability that a word in the free group becomes (much) shorter?
6
Characterization of the non-negative definite functions $f(x,y)$
6
Vanishing Trace
6
Symmetric subspace of linear operators
6
Sums of Unitary Matrices
6
Stone-Weierstrass analogue for $L^p$
6
von Neumann automorphisms: does convergence on a dense algebra imply $u$-convergence?
5
Sums of unitaries with small norm in full group $C^*$-algebras
5
Comparison of the norm of a matrix and its entry-wise absolute value.
5
Expected norm of sum of random orthogonal matrices
5
Complement of a subspace which is a cartesian product
5
Seeking proof for linear algebra constraint problem.
5
An inequality on concave functions
5
Partial isometries making families of linearly independent vectors orthogonal
4
bounding the trace of a matrix product by the operator norms; generalized Hölder inequality?
4
omega-Commuting matrices vs Stone-von Neumann Theorem
4
Commuting unitaries
4
When is this map completely positive?
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