Search Results for author: Hugo Berard

Found 10 papers, 7 papers with code

Stochastic Gradient Descent-Ascent: Unified Theory and New Efficient Methods

1 code implementation15 Feb 2022 Aleksandr Beznosikov, Eduard Gorbunov, Hugo Berard, Nicolas Loizou

Although variants of the new methods are known for solving minimization problems, they were never considered or analyzed for solving min-max problems and VIPs.

Stochastic Extragradient: General Analysis and Improved Rates

1 code implementation16 Nov 2021 Eduard Gorbunov, Hugo Berard, Gauthier Gidel, Nicolas Loizou

The Stochastic Extragradient (SEG) method is one of the most popular algorithms for solving min-max optimization and variational inequalities problems (VIP) appearing in various machine learning tasks.

A Distributional Robustness Perspective on Adversarial Training with the $\infty$-Wasserstein Distance

no code implementations29 Sep 2021 Chiara Regniez, Gauthier Gidel, Hugo Berard

We show a formal connection between our formulation and optimal transport by relaxing AT into DRO problem with an $\infty$-Wasserstein constraint.

Stochastic Gradient Descent-Ascent and Consensus Optimization for Smooth Games: Convergence Analysis under Expected Co-coercivity

1 code implementation NeurIPS 2021 Nicolas Loizou, Hugo Berard, Gauthier Gidel, Ioannis Mitliagkas, Simon Lacoste-Julien

Two of the most prominent algorithms for solving unconstrained smooth games are the classical stochastic gradient descent-ascent (SGDA) and the recently introduced stochastic consensus optimization (SCO) [Mescheder et al., 2017].

Online Adversarial Attacks

1 code implementation ICLR 2022 Andjela Mladenovic, Avishek Joey Bose, Hugo Berard, William L. Hamilton, Simon Lacoste-Julien, Pascal Vincent, Gauthier Gidel

Adversarial attacks expose important vulnerabilities of deep learning models, yet little attention has been paid to settings where data arrives as a stream.

Adversarial Attack

Adversarial Example Games

1 code implementation NeurIPS 2020 Avishek Joey Bose, Gauthier Gidel, Hugo Berard, Andre Cianflone, Pascal Vincent, Simon Lacoste-Julien, William L. Hamilton

We introduce Adversarial Example Games (AEG), a framework that models the crafting of adversarial examples as a min-max game between a generator of attacks and a classifier.

A Closer Look at the Optimization Landscapes of Generative Adversarial Networks

1 code implementation ICLR 2020 Hugo Berard, Gauthier Gidel, Amjad Almahairi, Pascal Vincent, Simon Lacoste-Julien

Generative adversarial networks have been very successful in generative modeling, however they remain relatively challenging to train compared to standard deep neural networks.

A Variational Inequality Perspective on Generative Adversarial Networks

1 code implementation ICLR 2019 Gauthier Gidel, Hugo Berard, Gaëtan Vignoud, Pascal Vincent, Simon Lacoste-Julien

Generative adversarial networks (GANs) form a generative modeling approach known for producing appealing samples, but they are notably difficult to train.

Misconceptions

Parametric Adversarial Divergences are Good Losses for Generative Modeling

no code implementations ICLR 2018 Gabriel Huang, Hugo Berard, Ahmed Touati, Gauthier Gidel, Pascal Vincent, Simon Lacoste-Julien

Parametric adversarial divergences, which are a generalization of the losses used to train generative adversarial networks (GANs), have often been described as being approximations of their nonparametric counterparts, such as the Jensen-Shannon divergence, which can be derived under the so-called optimal discriminator assumption.

Structured Prediction

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