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Results tagged with sp.spectral-theory
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user 5963
Schrodinger operators, operators on manifolds, general differential operators, numerical studies, integral operators, discrete models, resonances, non-self-adjoint operators, random operators/matrices
9
votes
Accepted
Can a perturbation of a matrix product always be represented as product of perturbations of ...
The condition you want is exactly that the matrix multiplication map be locally open at the pair $(B,C)$. This is the topic of the recent paper Where is matrix multiplication locally open? by Behrend …
- 8,501
6
votes
Accepted
Analogue of PSD matrices for permanents?
The set $C$ is not convex, nor is its intersection with the symmetric matrices. To see this note that by linearly interpolating between each of the matrices below we maintain positive permanent and s …
- 8,501