Search Results for author: Bertrand Michel

Found 11 papers, 4 papers with code

Differentiable Mapper For Topological Optimization Of Data Representation

1 code implementation20 Feb 2024 Ziyad Oulhaj, Mathieu Carrière, Bertrand Michel

While highly generic and applicable, its use has been hampered so far by the manual tuning of its many parameters-among these, a crucial one is the so-called filter: it is a continuous function whose variations on the data set are the main ingredient for both building the Mapper representation and assessing the presence and sizes of its topological structures.

Topological Data Analysis

Weighted least-squares approximation with determinantal point processes and generalized volume sampling

no code implementations21 Dec 2023 Anthony Nouy, Bertrand Michel

We first provide a generalized version of volume-rescaled sampling yielding quasi-optimality results in expectation with a number of samples $n = O(m\log(m))$, that means that the expected $L^2$ error is bounded by a constant times the best approximation error in $L^2$.

Point Processes

Learning with tree tensor networks: complexity estimates and model selection

no code implementations2 Jul 2020 Bertrand Michel, Anthony Nouy

We propose and analyze a complexity-based model selection method for tree tensor networks in an empirical risk minimization framework and we analyze its performance over a wide range of smoothness classes.

Model Selection Quantization +1

Statistical analysis of Mapper for stochastic and multivariate filters

no code implementations23 Dec 2019 Mathieu Carrière, Bertrand Michel

The stability and quantification of the rate of convergence of the Mapper to the Reeb space has been studied a lot in recent works [BBMW19, CO17, CMO18, MW16], focusing on the case where a scalar-valued filter is used for the computation of Mapper.

Data Visualization Topological Data Analysis

An introduction to Topological Data Analysis: fundamental and practical aspects for data scientists

1 code implementation11 Oct 2017 Frédéric Chazal, Bertrand Michel

Topological Data Analysis is a recent and fast growing field providing a set of new topological and geometric tools to infer relevant features for possibly complex data.

Topological Data Analysis

Data driven estimation of Laplace-Beltrami operator

no code implementations NeurIPS 2016 Frédéric Chazal, Ilaria Giulini, Bertrand Michel

Approximations of Laplace-Beltrami operators on manifolds through graph Lapla-cians have become popular tools in data analysis and machine learning.

BIG-bench Machine Learning

Robust Topological Inference: Distance To a Measure and Kernel Distance

2 code implementations22 Dec 2014 Frédéric Chazal, Brittany T. Fasy, Fabrizio Lecci, Bertrand Michel, Alessandro Rinaldo, Larry Wasserman

However, the empirical distance function is highly non-robust to noise and outliers.

Statistics Theory Computational Geometry Algebraic Topology Statistics Theory

Subsampling Methods for Persistent Homology

no code implementations7 Jun 2014 Frédéric Chazal, Brittany Terese Fasy, Fabrizio Lecci, Bertrand Michel, Alessandro Rinaldo, Larry Wasserman

Persistent homology is a multiscale method for analyzing the shape of sets and functions from point cloud data arising from an unknown distribution supported on those sets.

Algebraic Topology Computational Geometry Applications

Sparse Bayesian Unsupervised Learning

no code implementations30 Jan 2014 Stephane Gaiffas, Bertrand Michel

This paper is about variable selection, clustering and estimation in an unsupervised high-dimensional setting.

Clustering Variable Selection

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