Asymptotic profiles of nonlinear homogeneous evolution equations of gradient flow type

L Bungert, M Burger - Journal of Evolution Equations, 2020 - Springer
This work is concerned with the gradient flow of absolutely p-homogeneous convex
functionals on a Hilbert space, which we show to exhibit finite (p< 2 p< 2) or infinite …

Total variation and mean curvature PDEs on the homogeneous space of positions and orientations

BMN Smets, J Portegies, E St-Onge, R Duits - Journal of Mathematical …, 2021 - Springer
Two key ideas have greatly improved techniques for image enhancement and denoising:
the lifting of image data to multi-orientation distributions and the application of nonlinear …

Structural analysis of an L-infinity variational problem and relations to distance functions

L Bungert, Y Korolev, M Burger - Pure and Applied Analysis, 2020 - msp.org
We analyse the functional 𝒥 (u)=∥∇ u∥∞ defined on Lipschitz functions with
homogeneous Dirichlet boundary conditions. Our analysis is performed directly on the …

Variational graph p-Laplacian eigendecomposition under p-orthogonality constraints

A Lanza, S Morigi, G Recupero - Computational Optimization and …, 2024 - Springer
The p-Laplacian is a non-linear generalization of the Laplace operator. In the graph context,
its eigenfunctions are used for data clustering, spectral graph theory, dimensionality …

[图书][B] Latent Modes of Nonlinear Flows: A Koopman Theory Analysis

I Cohen, G Gilboa - 2023 - cambridge.org
Extracting the latent underlying structures of complex nonlinear local and nonlocal flows is
essential for their analysis and modeling. In this Element the authors attempt to provide a …

On the correspondence between replicator dynamics and assignment flows

B Boll, J Schwarz, C Schnörr - … Conference on Scale Space and Variational …, 2021 - Springer
Assignment flows are smooth dynamical systems for data labeling on graphs. Although they
exhibit structural similarities with the well-studied class of replicator dynamics, it is nontrivial …

Latent Modes of Nonlinear Flows--a Koopman Theory Analysis

I Cohen, G Gilboa - arXiv preprint arXiv:2107.07456, 2021 - arxiv.org
Extracting the latent underlying structures of complex nonlinear local and nonlocal flows is
essential for their analysis and modeling. In this work, we attempt to provide a consistent …

Graph -Laplacian eigenpairs as saddle points of a family of spectral energy functions

P Deidda, N Segala, M Putti - arXiv preprint arXiv:2405.07056, 2024 - arxiv.org
We address the problem of computing the graph $ p $-Laplacian eigenpairs for $ p\in
(2,\infty) $. We propose a reformulation of the graph $ p $-Laplacian eigenvalue problem in …

Nonlinear power method for computing eigenvectors of proximal operators and neural networks

L Bungert, E Hait-Fraenkel, N Papadakis… - SIAM Journal on Imaging …, 2021 - SIAM
Neural networks have revolutionized the field of data science, yielding remarkable solutions
in a data-driven manner. For instance, in the field of mathematical imaging, they have …

The infinity Laplacian eigenvalue problem: reformulation and a numerical scheme

F Bozorgnia, L Bungert, D Tenbrinck - Journal of Scientific Computing, 2024 - Springer
In this work, we present an alternative formulation of the higher eigenvalue problem
associated to the infinity Laplacian, which opens the door for numerical approximation of …