2023/10/26 by Peter Bubenik, Bubenik, Peter, Johnathan Bush +1
Biochemistry, Genetics and Molecular Biology · Computer Science · #55N31 #Algebraic Topology (math.AT) #FOS: Mathematics #Metabolomics and Mass Spectrometry Studies #Optimization and Control (math.OC) #Topological and Geometric Data Analysis
paper · pdf · doi:10.48550/arxiv.2310.17494
openalex publication_date 2023/10/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We use tools from applied topology for feature selection on time series data. We develop a method for scoring the variables in a multivariate time series that reflects their contributions to the topological features of the corresponding point cloud. Our approach produces a piecewise-linear Lipschitz gradient path in the standard geometric simplex that starts at the barycenter, which weights the variables equally, and ends at the score. Adding Gaussian perturbations to the input data and taking expectations results in a mean gradient path that satisfies a strong law of large numbers and central limit theorem. Our theory is motivated by the analysis of the neuronal activities of the nematode C. elegans, and our method selects an informative subset of the neurons that optimizes the coordinated dynamics.