Search Results for author: Andrés Hoyos-Idrobo

Found 7 papers, 4 papers with code

Learning to Re-rank with Constrained Meta-Optimal Transport

no code implementations29 Apr 2023 Andrés Hoyos-Idrobo

Many re-ranking strategies in search systems rely on stochastic ranking policies, encoded as Doubly-Stochastic (DS) matrices, that satisfy desired ranking constraints in expectation, e. g., Fairness of Exposure (FOE).

Fairness Learning-To-Rank +1

Approximate Birkhoff-von-Neumann decomposition: a differentiable approach

no code implementations1 Jan 2021 Andrés Hoyos-Idrobo

We offer an empirical evaluation of this approach in the fairness of exposure in rankings, where we show that the outcome of our method behaves similarly to greedy algorithms.

Fairness Riemannian optimization

Aligning Hyperbolic Representations: an Optimal Transport-based approach

1 code implementation2 Dec 2020 Andrés Hoyos-Idrobo

As a result of this formalism, we derive extensions to some existing Euclidean methods of OT-based domain adaptation to their hyperbolic counterparts.

Domain Adaptation Ontology Matching +1

Local Bures-Wasserstein Transport: A Practical and Fast Mapping Approximation

1 code implementation19 Jun 2019 Andrés Hoyos-Idrobo

Optimal transport (OT)-based methods have a wide range of applications and have attracted a tremendous amount of attention in recent years.

Fast clustering for scalable statistical analysis on structured images

no code implementations16 Nov 2015 Bertrand Thirion, Andrés Hoyos-Idrobo, Jonas Kahn, Gael Varoquaux

The use of brain images as markers for diseases or behavioral differences is challenged by the small effects size and the ensuing lack of power, an issue that has incited researchers to rely more systematically on large cohorts.

Clustering Computational Efficiency +1

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