This was part of Randomness in Topology and its Applications

Data Analysis in Metric Spaces Through Metric Observables

Washington Mio, Florida State University
Monday, March 20, 2023


We discuss ways of probing the shape of data in metric spaces using metric observables (1-Lipschitz functions). This leads to a dimension reduction, data visualization, and statistical analysis technique that we call Principal Observable Analysis. We also discuss the construction of robust data summaries associated with such metric observables in the form of filtered merge trees, Reeb graphs, and Leray-Reeb pre-cosheaves.