Search Results for author: Luis A. Ortega

Found 7 papers, 3 papers with code

PAC-Bayes-Chernoff bounds for unbounded losses

no code implementations2 Jan 2024 Ioar Casado, Luis A. Ortega, Andrés R. Masegosa, Aritz Pérez

This result can be understood as a PAC-Bayesian version of the Cram\'er-Chernoff bound.

If there is no underfitting, there is no Cold Posterior Effect

no code implementations2 Oct 2023 Yijie Zhang, Yi-Shan Wu, Luis A. Ortega, Andrés R. Masegosa

The cold posterior effect (CPE) (Wenzel et al., 2020) in Bayesian deep learning shows that, for posteriors with a temperature $T<1$, the resulting posterior predictive could have better performances than the Bayesian posterior ($T=1$).

PAC-Chernoff Bounds: Understanding Generalization in the Interpolation Regime

no code implementations19 Jun 2023 Andrés R. Masegosa, Luis A. Ortega

This paper introduces a distribution-dependent PAC-Chernoff bound that exhibits perfect tightness for interpolators, even within over-parameterized model classes.

Data Augmentation

Deep Variational Implicit Processes

1 code implementation14 Jun 2022 Luis A. Ortega, Simón Rodríguez Santana, Daniel Hernández-Lobato

This generalization is similar to that of deep GPs over GPs, but it is more flexible due to the use of IPs as the prior distribution over the latent functions.

Gaussian Processes Variational Inference

Diversity and Generalization in Neural Network Ensembles

1 code implementation26 Oct 2021 Luis A. Ortega, Rafael Cabañas, Andrés R. Masegosa

In this work, we combine and expand previously published results in a theoretically sound framework that describes the relationship between diversity and ensemble performance for a wide range of ensemble methods.

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