no code implementations • 24 May 2022 • Limor Gultchin, Vincent Cohen-Addad, Sophie Giffard-Roisin, Varun Kanade, Frederik Mallmann-Trenn
Among the various aspects of algorithmic fairness studied in recent years, the tension between satisfying both \textit{sufficiency} and \textit{separation} -- e. g. the ratios of positive or negative predictive values, and false positive or false negative rates across groups -- has received much attention.
no code implementations • NeurIPS 2020 • Vincent Cohen-Addad, Adrian Kosowski, Frederik Mallmann-Trenn, David Saulpic
A classic problem in machine learning and data analysis is to partition the vertices of a network in such a way that vertices in the same set are densely connected and vertices in different sets are loosely connected.
no code implementations • 9 Jun 2020 • Piotr Indyk, Frederik Mallmann-Trenn, Slobodan Mitrović, Ronitt Rubinfeld
In contrast, we show that if the algorithm is given a prediction of the input sequence, then it can achieve a competitive ratio that tends to $1$ as the prediction error rate tends to $0$.
no code implementations • 10 Sep 2019 • Nancy Lynch, Frederik Mallmann-Trenn
Our main goal is to introduce a general framework for these tasks and prove formally how both (recognition and learning) can be achieved.
no code implementations • NeurIPS 2018 • Vincent Cohen-Addad, Varun Kanade, Frederik Mallmann-Trenn
In this work, we take a different approach, based on the observation that the consistency axiom fails to be satisfied when the “correct” number of clusters changes.
no code implementations • 21 Jun 2018 • Vincent Cohen-Addad, Frederik Mallmann-Trenn, Claire Mathieu
In this paper, we show optimal worst-case query complexity for the \textsc{max},\textsc{threshold-$v$} and \textsc{Top}-$k$ problems.
no code implementations • NeurIPS 2017 • Vincent Cohen-Addad, Varun Kanade, Frederik Mallmann-Trenn
Hiererachical clustering, that is computing a recursive partitioning of a dataset to obtain clusters at increasingly finer granularity is a fundamental problem in data analysis.
no code implementations • 7 Apr 2017 • Vincent Cohen-Addad, Varun Kanade, Frederik Mallmann-Trenn, Claire Mathieu
For similarity-based hierarchical clustering, Dasgupta showed that the divisive sparsest-cut approach achieves an $O(\log^{3/2} n)$-approximation.