Search Results for author: Luiz F. O. Chamon

Found 13 papers, 2 papers with code

Near-Optimal Solutions of Constrained Learning Problems

no code implementations18 Mar 2024 Juan Elenter, Luiz F. O. Chamon, Alejandro Ribeiro

These requirements can be imposed (with generalization guarantees) by formulating constrained learning problems that can then be tackled by dual ascent algorithms.

Fairness

Reply to 'Comments on Graphon Signal Processing' [arXiv:2310.14683]

no code implementations5 Jan 2024 Luana Ruiz, Luiz F. O. Chamon, Alejandro Ribeiro

This technical note addresses an issue [arXiv:2310. 14683] with the proof (but not the statement) of [arXiv:2003. 05030, Proposition 4].

LEMMA valid

Resilient Constrained Learning

no code implementations NeurIPS 2023 Ignacio Hounie, Alejandro Ribeiro, Luiz F. O. Chamon

This paper presents a constrained learning approach that adapts the requirements while simultaneously solving the learning task.

Fairness Federated Learning +1

Learning Globally Smooth Functions on Manifolds

no code implementations1 Oct 2022 Juan Cervino, Luiz F. O. Chamon, Benjamin D. Haeffele, Rene Vidal, Alejandro Ribeiro

To do so, it shows that under typical conditions the problem of learning a Lipschitz continuous function on a manifold is equivalent to a dynamically weighted manifold regularization problem.

Automatic Data Augmentation via Invariance-Constrained Learning

1 code implementation29 Sep 2022 Ignacio Hounie, Luiz F. O. Chamon, Alejandro Ribeiro

Despite its ubiquity, its effectiveness depends on the choices of which transformations to apply, when to do so, and how often.

 Ranked #1 on Image Classification on SVHN (Percentage correct metric)

Data Augmentation Image Classification

Probabilistically Robust Learning: Balancing Average- and Worst-case Performance

1 code implementation2 Feb 2022 Alexander Robey, Luiz F. O. Chamon, George J. Pappas, Hamed Hassani

From a theoretical point of view, this framework overcomes the trade-offs between the performance and the sample-complexity of worst-case and average-case learning.

Transferability Properties of Graph Neural Networks

no code implementations9 Dec 2021 Luana Ruiz, Luiz F. O. Chamon, Alejandro Ribeiro

In this paper, we study the problem of training GNNs on graphs of moderate size and transferring them to large-scale graphs.

Movie Recommendation

Adversarial Robustness with Semi-Infinite Constrained Learning

no code implementations NeurIPS 2021 Alexander Robey, Luiz F. O. Chamon, George J. Pappas, Hamed Hassani, Alejandro Ribeiro

In particular, we leverage semi-infinite optimization and non-convex duality theory to show that adversarial training is equivalent to a statistical problem over perturbation distributions, which we characterize completely.

Adversarial Robustness

Constrained Learning with Non-Convex Losses

no code implementations8 Mar 2021 Luiz F. O. Chamon, Santiago Paternain, Miguel Calvo-Fullana, Alejandro Ribeiro

In this paper, we overcome this issue by learning in the empirical dual domain, where constrained statistical learning problems become unconstrained and deterministic.

Adversarial Robustness Fairness +1

Towards Safe Continuing Task Reinforcement Learning

no code implementations24 Feb 2021 Miguel Calvo-Fullana, Luiz F. O. Chamon, Santiago Paternain

However, to transfer from learning safety to learning safely, there are two hurdles that need to be overcome: (i) it has to be possible to learn the policy without having to re-initialize the system; and (ii) the rollouts of the system need to be in themselves safe.

reinforcement-learning Reinforcement Learning (RL) +1

State Augmented Constrained Reinforcement Learning: Overcoming the Limitations of Learning with Rewards

no code implementations23 Feb 2021 Miguel Calvo-Fullana, Santiago Paternain, Luiz F. O. Chamon, Alejandro Ribeiro

Thus, as we illustrate by an example, while previous methods can fail at finding optimal policies, running the dual dynamics while executing the augmented policy yields an algorithm that provably samples actions from the optimal policy.

reinforcement-learning Reinforcement Learning (RL)

Trust but Verify: Assigning Prediction Credibility by Counterfactual Constrained Learning

no code implementations24 Nov 2020 Luiz F. O. Chamon, Santiago Paternain, Alejandro Ribeiro

Prediction credibility measures, in the form of confidence intervals or probability distributions, are fundamental in statistics and machine learning to characterize model robustness, detect out-of-distribution samples (outliers), and protect against adversarial attacks.

counterfactual

Graphon Signal Processing

no code implementations10 Mar 2020 Luana Ruiz, Luiz F. O. Chamon, Alejandro Ribeiro

Graphons are infinite-dimensional objects that represent the limit of convergent sequences of graphs as their number of nodes goes to infinity.

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