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Astor
  • Member for 8 years, 1 month
  • Last seen more than a week ago
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4
Zero diagonal nonsymmetric block checkerboard matrix: orbits and numerical ranges
Aug 13, 2017
question
3
Singular value decomposition of a low rank weak diagonally dominant M-matrix. When is the unitary polar matrix positive semi-definite?
Jan 25, 2017
question
3
Numerical range in subspaces
Sep 1, 2017
question
2
Norm of a the skew symmetric part of a unitary matrix
May 12, 2017
question
2
Lower bound for the sum of cosines between singular vectors of diagonally dominant matrices
Jul 19, 2017
question
2
Coarse grid correction
Aug 16, 2017
question
1
Can I modify the singular values of a matrix in order to get a negative eigenvalue?
Apr 26, 2017
question
1
Norm numerical range
Sep 1, 2017
answer
1
Non-strict column diagonally dominant matrix inner product
Jul 24, 2016
answer
1
Matrix equation of the form $C A C^\intercal = D$
Oct 19, 2018
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The sum of odd powered complex numbers equals zero implies they cancel each other in pairs