Comment by Rodrigo de Azevedo on Correlation in convex corners
Does $\operatorname{conv}$ denote the convex hull?
View ArticleComment by Rodrigo de Azevedo on Solving $\sum_i \sqrt{h^{-1}g_i}=I$ for a...
It is a bit confusing when some matrices are lowercase and others are uppercase
View ArticleComment by Rodrigo de Azevedo on On certificates of unsatisfiability of...
The constraint $x \in \{-1,0,+1\}$ can be encoded polynomially as $x^3 = x$, which would intrude into real algebraic geometry and the like. Have you tried such an approach?
View ArticleComment by Rodrigo de Azevedo on Find the common vertex in an intersection of...
Are you acquainted with the "translation" from $\cal H$-polytopes to $\cal V$-polytopes and vice-versa?
View ArticleAnswer by Rodrigo de Azevedo for Nearest matrix orthogonally similar to a...
Using the spectral norm, we have the following optimization problem in matrix $\mathrm X \in \mathbb R^{n \times n}$$$\begin{array}{ll} \text{minimize} & \| \mathrm A \mathrm X - \mathrm X \mathrm...
View ArticleComment by Rodrigo de Azevedo on Intersection of a large number of...
Are any of those semialgebraic sets (convex) ellipsoids?
View ArticleComment by Rodrigo de Azevedo on Hadamard determinant problem and the special...
Doesn't Hypothesis 1 follow from Hadamard's inequality?
View ArticleComment by Rodrigo de Azevedo on Variant of Wahba's problem
Are you still interested in this?
View ArticleComment by Rodrigo de Azevedo on The homotopy type of the unit ball of tuples...
FWIIW, the unit ball in the spectral norm in ${\Bbb C}^{n \times n}$ is the convex hull of the unitary group.
View ArticleComment by Rodrigo de Azevedo on Circulant $\{-1,0,+1\}$ matrix Hadamard...
Do you agree with my edits?
View ArticleComment by Rodrigo de Azevedo on Correlation in convex corners
Does $\operatorname{conv}$ denote the convex hull?
View ArticleComment by Rodrigo de Azevedo on Invertible perturbations of matrices
What does $Q < P$ mean?
View ArticleComment by Rodrigo de Azevedo on On the minimum of a semidefinite program (SDP)
Please append your Matlab code.
View ArticleComment by Rodrigo de Azevedo on Disjoint nonsingular matrix partition
"Either [...] or" $\equiv$ exclusive or, right?
View ArticleComment by Rodrigo de Azevedo on Simultaneous similarity of pair of matrices
@jeq There's an endlichdimensionalen in that one, though.
View ArticleComment by Rodrigo de Azevedo on Solving an SDP that involves a decreasing...
Unless the skew-circulant matrix $A$ is symmetric, what does $A \succeq B$ even mean?
View ArticleComment by Rodrigo de Azevedo on Polynomials that preserve nonnegativity
Isn't this a sort of generalization of copositivity?
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