27 citations · 138 across the 24 of their papers we have counts for
3 papers · 1 filter
On the Kronecker and Caratheodory-Fejer theorems in several variables
Fredrik Andersson, Marcus Carlsson
Multivariate versions of the Kronecker theorem in the continuous multivariate setting has recently been published. These theorems characterize the symbols that give rise to finite…
Fast algorithms and efficient GPU implementations for the Radon transform and the back-projection operator represented as convolution operators
Fredrik Andersson, Marcus Carlsson, Viktor V. Nikitin
The Radon transform and its adjoint, the back-projection operator, can both be expressed as convolutions in log-polar coordinates. Hence, fast algorithms for the application of the…
Operator-Lipschitz estimates for the singular value functional calculus
Fredrik Andersson, Marcus Carlsson, Karl-Mikael Perfekt
We consider a functional calculus for compact operators, acting on the singular values rather than the spectrum, which appears frequently in applied mathematics. Necessary and suff…