Search Results for author: Nicolás García Trillos

Found 8 papers, 2 papers with code

Fermat Distances: Metric Approximation, Spectral Convergence, and Clustering Algorithms

no code implementations7 Jul 2023 Nicolás García Trillos, Anna Little, Daniel Mckenzie, James M. Murphy

In particular, we show the discrete eigenvalues and eigenvectors converge to their continuum analogues at a dimension-dependent rate, which allows us to interpret the efficacy of discrete spectral clustering using Fermat distances in terms of the resulting continuum limit.

Clustering

It begins with a boundary: A geometric view on probabilistically robust learning

1 code implementation30 May 2023 Leon Bungert, Nicolás García Trillos, Matt Jacobs, Daniel Mckenzie, Đorđe Nikolić, Qingsong Wang

Although deep neural networks have achieved super-human performance on many classification tasks, they often exhibit a worrying lack of robustness towards adversarially generated examples.

Wasserstein Barycenter-based Model Fusion and Linear Mode Connectivity of Neural Networks

1 code implementation13 Oct 2022 Aditya Kumar Akash, Sixu Li, Nicolás García Trillos

In our framework, the fusion occurs in a layer-wise manner and builds on an interpretation of a node in a network as a function of the layer preceding it.

Linear Mode Connectivity

Rates of Convergence for Regression with the Graph Poly-Laplacian

no code implementations6 Sep 2022 Nicolás García Trillos, Ryan Murray, Matthew Thorpe

In the (special) smoothing spline problem one considers a variational problem with a quadratic data fidelity penalty and Laplacian regularisation.

regression

The Geometry of Adversarial Training in Binary Classification

no code implementations26 Nov 2021 Leon Bungert, Nicolás García Trillos, Ryan Murray

We establish an equivalence between a family of adversarial training problems for non-parametric binary classification and a family of regularized risk minimization problems where the regularizer is a nonlocal perimeter functional.

Binary Classification Classification

Clustering dynamics on graphs: from spectral clustering to mean shift through Fokker-Planck interpolation

no code implementations18 Aug 2021 Katy Craig, Nicolás García Trillos, Dejan Slepčev

In this work we build a unifying framework to interpolate between density-driven and geometry-based algorithms for data clustering, and specifically, to connect the mean shift algorithm with spectral clustering at discrete and continuum levels.

Clustering

A variational approach to the consistency of spectral clustering

no code implementations8 Aug 2015 Nicolás García Trillos, Dejan Slepčev

We also show that the discrete clusters obtained via spectral clustering converge towards a continuum partition of the ground truth measure.

Clustering

Continuum limit of total variation on point clouds

no code implementations25 Mar 2014 Nicolás García Trillos, Dejan Slepčev

We consider point clouds obtained as random samples of a measure on a Euclidean domain.

Clustering

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