Search Results for author: Laurent Meunier

Found 17 papers, 3 papers with code

Towards Consistency in Adversarial Classification

no code implementations20 May 2022 Laurent Meunier, Raphaël Ettedgui, Rafael Pinot, Yann Chevaleyre, Jamal Atif

In this paper, we expose some pathological behaviors specific to the adversarial problem, and show that no convex surrogate loss can be consistent or calibrated in this context.

Classification

An Asymptotic Test for Conditional Independence using Analytic Kernel Embeddings

1 code implementation28 Oct 2021 Meyer Scetbon, Laurent Meunier, Yaniv Romano

We propose a new conditional dependence measure and a statistical test for conditional independence.

A Dynamical System Perspective for Lipschitz Neural Networks

no code implementations25 Oct 2021 Laurent Meunier, Blaise Delattre, Alexandre Araujo, Alexandre Allauzen

The Lipschitz constant of neural networks has been established as a key quantity to enforce the robustness to adversarial examples.

Asymptotic convergence rates for averaging strategies

no code implementations10 Aug 2021 Laurent Meunier, Iskander Legheraba, Yann Chevaleyre, Olivier Teytaud

Averaging the $\mu$ best individuals among the $\lambda$ evaluations is known to provide better estimates of the optimum of a function than just picking up the best.

Advocating for Multiple Defense Strategies against Adversarial Examples

no code implementations4 Dec 2020 Alexandre Araujo, Laurent Meunier, Rafael Pinot, Benjamin Negrevergne

It has been empirically observed that defense mechanisms designed to protect neural networks against $\ell_\infty$ adversarial examples offer poor performance against $\ell_2$ adversarial examples and vice versa.

Black-Box Optimization Revisited: Improving Algorithm Selection Wizards through Massive Benchmarking

no code implementations8 Oct 2020 Laurent Meunier, Herilalaina Rakotoarison, Pak Kan Wong, Baptiste Roziere, Jeremy Rapin, Olivier Teytaud, Antoine Moreau, Carola Doerr

We demonstrate the advantages of such a broad collection by deriving from it Automated Black Box Optimizer (ABBO), a general-purpose algorithm selection wizard.

Benchmarking

Equitable and Optimal Transport with Multiple Agents

no code implementations12 Jun 2020 Meyer Scetbon, Laurent Meunier, Jamal Atif, Marco Cuturi

When there is only one agent, we recover the Optimal Transport problem.

On averaging the best samples in evolutionary computation

no code implementations24 Apr 2020 Laurent Meunier, Yann Chevaleyre, Jeremy Rapin, Clément W. Royer, Olivier Teytaud

With our choice of selection rate, we get a provable regret of order $O(\lambda^{-1})$ which has to be compared with $O(\lambda^{-2/d})$ in the case where $\mu=1$.

Variance Reduction for Better Sampling in Continuous Domains

no code implementations24 Apr 2020 Laurent Meunier, Carola Doerr, Jeremy Rapin, Olivier Teytaud

Design of experiments, random search, initialization of population-based methods, or sampling inside an epoch of an evolutionary algorithm use a sample drawn according to some probability distribution for approximating the location of an optimum.

Yet another but more efficient black-box adversarial attack: tiling and evolution strategies

no code implementations5 Oct 2019 Laurent Meunier, Jamal Atif, Olivier Teytaud

In the targeted setting, we are able to reach, with a limited budget of $100, 000$, $100\%$ of success rate with a budget of $6, 662$ queries on average, i. e. we need $800$ queries less than the current state of the art.

Adversarial Attack

Robust Neural Networks using Randomized Adversarial Training

no code implementations25 Mar 2019 Alexandre Araujo, Laurent Meunier, Rafael Pinot, Benjamin Negrevergne

This paper tackles the problem of defending a neural network against adversarial attacks crafted with different norms (in particular $\ell_\infty$ and $\ell_2$ bounded adversarial examples).

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