Modes of homogeneous gradient flows

I Cohen, O Azencot, P Lifshits, G Gilboa - SIAM Journal on Imaging Sciences, 2021 - SIAM
Finding latent structures in data is drawing increasing attention in diverse fields such as
image and signal processing, fluid dynamics, and machine learning. In this work we …

Introducing the p-Laplacian spectra

I Cohen, G Gilboa - Signal Processing, 2020 - Elsevier
In this work we develop a nonlinear decomposition, associated with nonlinear
eigenfunctions of the p-Laplacian for p∈(1, 2). With this decomposition we can process …

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 …

An eigenvalue problem for self-similar patterns in Hele-Shaw flows

W Xiao, L Feng, F Yang, K Liu, M Zhao - Physica D: Nonlinear Phenomena, 2024 - Elsevier
Hele-Shaw problems are prototypes to study the interface dynamics. Linear theory suggests
the existence of self-similar patterns in a Hele-Shaw flow. That is, with a specific injection …

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 …

Gradient flows and nonlinear power methods for the computation of nonlinear eigenfunctions

L Bungert, M Burger - Handbook of numerical analysis, 2022 - Elsevier
This chapter describes how gradient flows and nonlinear power methods in Banach spaces
can be used to solve nonlinear eigenvector-dependent eigenvalue problems, and how …

Stable explicit p-Laplacian flows based on nonlinear eigenvalue analysis

I Cohen, A Falik, G Gilboa - Scale Space and Variational Methods in …, 2019 - Springer
Implementation of nonlinear flows by explicit schemes can be very convenient, due to their
simplicity and low-computational cost per time step. A well known drawback is the small time …

Shape Preserving Flows and the p− Laplacian Spectra

I Cohen, G Gilboa - 2018 - hal.science
We examine nonlinear scale-spaces in the general form ut= P (u (t)), where P is a bounded
nonlinear operator. We seek solutions with separation of variables in space and time u (x, t) …

Iterative methods for computing eigenvectors of nonlinear operators

G Gilboa - Handbook of mathematical models and algorithms in …, 2021 - Springer
In this chapter we are examining several iterative methods for solving nonlinear eigenvalue
problems. These arise in variational image processing, graph partition and classification …

Revealing stable and unstable modes of denoisers through nonlinear eigenvalue analysis

E Hait-Fraenkel, G Gilboa - Journal of Visual Communication and Image …, 2021 - Elsevier
In this paper, we propose to analyze stable and unstable modes of black-box image
denoisers through nonlinear eigenvalue analysis. We aim to find input images for which the …