Low-rank tensor methods for partial differential equations

M Bachmayr - Acta Numerica, 2023 - cambridge.org
Low-rank tensor representations can provide highly compressed approximations of
functions. These concepts, which essentially amount to generalizations of classical …

A robust collision source method for rank adaptive dynamical low-rank approximation in radiation therapy

J Kusch, P Stammer - ESAIM: Mathematical Modelling and …, 2023 - esaim-m2an.org
Deterministic models for radiation transport describe the density of radiation particles
moving through a background material. In radiation therapy applications, the phase space of …

[图书][B] Geometric methods on low-rank matrix and tensor manifolds

A Uschmajew, B Vandereycken - 2020 - Springer
In this chapter we present numerical methods for low-rank matrix and tensor problems that
explicitly make use of the geometry of rank constrained matrix and tensor spaces. We focus …

On the stability of robust dynamical low-rank approximations for hyperbolic problems

J Kusch, L Einkemmer, G Ceruti - SIAM Journal on Scientific Computing, 2023 - SIAM
The dynamical low-rank approximation (DLRA) is used to treat high-dimensional problems
that arise in such diverse fields as kinetic transport and uncertainty quantification. Even …

Rank-adaptive dynamical low-rank integrators for first-order and second-order matrix differential equations

M Hochbruck, M Neher, S Schrammer - BIT Numerical Mathematics, 2023 - Springer
Dynamical low-rank integrators for matrix differential equations recently attracted a lot of
attention and have proven to be very efficient in various applications. In this paper, we …

Dynamical low-rank integrator for the linear Boltzmann equation: error analysis in the diffusion limit

Z Ding, L Einkemmer, Q Li - SIAM Journal on Numerical Analysis, 2021 - SIAM
Dynamical low-rank algorithms are a class of numerical methods that compute low-rank
approximations of dynamical systems. This is accomplished by projecting the dynamics onto …

Low-rank Parareal: a low-rank parallel-in-time integrator

B Carrel, MJ Gander, B Vandereycken - BIT Numerical Mathematics, 2023 - Springer
In this work, the Parareal algorithm is applied to evolution problems that admit good low-
rank approximations and for which the dynamical low-rank approximation (DLRA) can be …

A low-rank Lie-Trotter splitting approach for nonlinear fractional complex Ginzburg-Landau equations

YL Zhao, A Ostermann, XM Gu - Journal of Computational Physics, 2021 - Elsevier
Abstract Fractional Ginzburg-Landau equations as generalizations of the classical one have
been used to describe various physical phenomena. In this paper, we propose a numerical …

Existence of dynamical low-rank approximations to parabolic problems

M Bachmayr, H Eisenmann, E Kieri… - Mathematics of …, 2021 - ams.org
The existence and uniqueness of weak solutions to dynamical low-rank evolution problems
for parabolic partial differential equations in two spatial dimensions is shown, covering also …

Time integration of symmetric and anti-symmetric low-rank matrices and Tucker tensors

G Ceruti, C Lubich - BIT Numerical Mathematics, 2020 - Springer
A numerical integrator is presented that computes a symmetric or skew-symmetric low-rank
approximation to large symmetric or skew-symmetric time-dependent matrices that are either …