28 citations · 85 across the 30 of their papers we have counts for
4 papers · 1 filter
A Twin gradient method for unconstrained optimization
Anna De Magistris, Michiel E. Hochstenbach, Gerardo Toraldo
We propose a new strategy for gradient-based unconstrained optimization, involving two parallel sequences of iterates that cooperate to determine their stepsizes via a \textit{Twin…
Transpose-free linear algebra
Diana Halikias, Michiel E. Hochstenbach, Alex Townsend
We study the limitations of matrix-free algorithms that access a matrix only through forward matrix-vector products (matvecs) , without access to the transpose $A…
Deterministic and randomized Kaczmarz methods for with applications to color image restoration
Wenli Wang, Duo Liu, Gangrong Qu +1
We study Kaczmarz type methods to solve consistent linear matrix equations. We first present a block Kaczmarz (BK) method that employs a deterministic cyclic row selection strategy…
On spectral properties and fast initial convergence of the Kaczmarz method
Per Christian Hansen, Michiel E. Hochstenbach
The Kaczmarz method is successfully used for solving discretizations of linear inverse problems, especially in computed tomography where it is known as ART. Practitioners often obs…