1 code implementation • 20 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.
no code implementations • 21 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 $L^2$.
3 code implementations • 17 Jul 2023 • Anthony Ozier-Lafontaine, Camille Fourneaux, Ghislain Durif, Polina Arsenteva, Céline Vallot, Olivier Gandrillon, Sandrine Giraud, Bertrand Michel, Franck Picard
Single-cell technologies offer insights into molecular feature distributions, but comparing them poses challenges.
no code implementations • 2 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.
no code implementations • 23 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.
1 code implementation • 11 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.
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.
2 code implementations • 22 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
no code implementations • 7 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
no code implementations • 30 Jan 2014 • Stephane Gaiffas, Bertrand Michel
This paper is about variable selection, clustering and estimation in an unsupervised high-dimensional setting.
no code implementations • 27 May 2013 • Frédéric Chazal, Marc Glisse, Catherine Labruère, Bertrand Michel
In this paper, we study topological persistence in general metric spaces, with a statistical approach.