A second-order accurate, operator splitting scheme for reaction-diffusion systems in an energetic variational formulation

C Liu, C Wang, Y Wang - SIAM Journal on Scientific Computing, 2022 - SIAM
A second-order accurate in time, positivity-preserving, and unconditionally energy stable
operator splitting scheme is proposed and analyzed for reaction-diffusion systems with the …

Aggregation-diffusion to constrained interaction: minimizers & gradient flows in the slow diffusion limit

K Craig, I Topaloglu - Annales de l'Institut Henri Poincaré C, 2020 - ems.press
Inspired by recent work on minimizers and gradient flows of constrained interaction
energies, we prove that these energies arise as the slow diffusion limit of well-known …

A first-order computational algorithm for reaction-diffusion type equations via primal-dual hybrid gradient method

S Liu, S Liu, S Osher, W Li - Journal of Computational Physics, 2024 - Elsevier
We propose an easy-to-implement iterative method for resolving the implicit (or semi-
implicit) schemes arising in solving reaction-diffusion (RD) type equations. We formulate the …

A tumor growth model of Hele-Shaw type as a gradient flow

S Di Marino, L Chizat - ESAIM: Control, Optimisation and Calculus of …, 2020 - esaim-cocv.org
In this paper, we characterize a degenerate PDE as the gradient flow in the space of
nonnegative measures endowed with an optimal transport-growth metric. The PDE of …

Darcy's law with a source term

M Jacobs, I Kim, J Tong - Archive for Rational Mechanics and Analysis, 2021 - Springer
We introduce a novel variant of the JKO scheme to approximate Darcy's law with a pressure
dependent source term. By introducing a new variable that implicitly controls the source …

Spherical Hellinger--Kantorovich Gradient Flows

S Kondratyev, D Vorotnikov - SIAM Journal on Mathematical Analysis, 2019 - SIAM
We study nonlinear degenerate parabolic equations of Fokker--Planck type that can be
viewed as gradient flows with respect to the recently introduced spherical Hellinger …

Dpvi: A dynamic-weight particle-based variational inference framework

C Zhang, Z Li, H Qian, X Du - arXiv preprint arXiv:2112.00945, 2021 - arxiv.org
The recently developed Particle-based Variational Inference (ParVI) methods drive the
empirical distribution of a set of\emph {fixed-weight} particles towards a given target …

On the symmetries in the dynamics of wide two-layer neural networks

K Hajjar, L Chizat - arXiv preprint arXiv:2211.08771, 2022 - arxiv.org
We consider the idealized setting of gradient flow on the population risk for infinitely wide
two-layer ReLU neural networks (without bias), and study the effect of symmetries on the …

[PDF][PDF] The Wasserstein–Fisher–Rao metric for waveform based earthquake location

D Zhou, J Chen, H Wu, D Yang, L Qiu - J. Comput. Math, 2023 - doc.global-sci.org
In this paper, we apply the Wasserstein-Fisher-Rao (WFR) metric from the unbalanced
optimal transport theory to the earthquake location problem. Compared with the quadratic …

Simulation of multiphase porous media flows with minimising movement and finite volume schemes

C Cancès, T Gallouët, M Laborde… - European Journal of …, 2019 - cambridge.org
The Wasserstein gradient flow structure of the partial differential equation system governing
multiphase flows in porous media was recently highlighted in Cancès et al.[Anal. PDE10 (8) …