Search Results for author: Jason J. Bramburger

Found 9 papers, 6 papers with code

Transferability of Graph Neural Networks using Graphon and Sampling Theories

no code implementations25 Jul 2023 A. Martina Neuman, Jason J. Bramburger

Graph neural networks (GNNs) have become powerful tools for processing graph-based information in various domains.

Auxiliary Functions as Koopman Observables: Data-Driven Analysis of Dynamical Systems via Polynomial Optimization

2 code implementations2 Mar 2023 Jason J. Bramburger, Giovanni Fantuzzi

We present a flexible data-driven method for dynamical system analysis that does not require explicit model discovery.

Model Discovery

Deep Learning of Conjugate Mappings

1 code implementation1 Apr 2021 Jason J. Bramburger, Steven L. Brunton, J. Nathan Kutz

The mapping that iterates the dynamics through consecutive intersections of the flow with the subspace is now referred to as a Poincar\'e map, and it is the primary method available for interpreting and classifying chaotic dynamics.

Dimensionality Reduction

The speed of traveling waves in a FKPP-Burgers system

1 code implementation28 Sep 2020 Jason J. Bramburger, Christopher Henderson

Because of the complex dynamics involved in this and similar models, this is one of the first precise results in the literature on the effect of the coupling on the traveling wave solution.

Analysis of PDEs Dynamical Systems

Minimum wave speeds in monostable reaction-diffusion equations: sharp bounds by polynomial optimization

1 code implementation9 Jun 2020 Jason J. Bramburger, David Goluskin

For scalar reaction-diffusion equations, we present a general method and then apply it to examples from the literature where minimum wave speeds were unknown.

Dynamical Systems Optimization and Control

Sparse Identification of Slow Timescale Dynamics

1 code implementation1 Jun 2020 Jason J. Bramburger, Daniel Dylewsky, J. Nathan Kutz

We show that for sufficiently disparate timescales this discovered mapping can be used to discover the continuous-time slow dynamics, thus providing a novel tool for extracting dynamics on multiple timescales.

Clustering

Stable Periodic Solutions to Lambda-Omega Lattice Dynamical Systems

no code implementations26 Sep 2019 Jason J. Bramburger

In this manuscript we consider the stability of periodic solutions to Lambda-Omega lattice dynamical systems.

Dynamical Systems

Poincaré Maps for Multiscale Physics Discovery and Nonlinear Floquet Theory

1 code implementation28 Aug 2019 Jason J. Bramburger, J. Nathan Kutz

Poincar\'e maps are an integral aspect to our understanding and analysis of nonlinear dynamical systems.

Dynamical Systems Chaotic Dynamics

Novel Substructure and Superfluid Dark Matter

no code implementations11 Jan 2019 Stephon Alexander, Jason J. Bramburger, Evan McDonough

The recent observation of the distribution of accreted stars (SDSS-Gaia DR2) suggests that a non-trivial fraction of dark matter is contained within halo substructure.

Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory

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