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April 07, 2021
Wednesday, April 07
Geometry and Topology
Time: 15:30
Speaker: Rick Jardine (Western)
Title: "The UMAP algorithm, reimagined"
Room: Zoom Meeting ID: 958 6908 4555

Abstract: The Healy-McInnes UMAP algorithm for a data set $X$ has been highly successful as a data science tool. The goal of this talk is to present a geometric version of this algorithm. The present approach requires Barr's generalized fuzzy sets with coefficients in the interval $[0,\infty]$, completeness properties of extended pseudo-metric spaces (ep-metric spaces), and manipulations of simplicial presheaves. We also use a geometric version of the cross entropy function for fuzzy sets with coefficients in $[0,\infty]$, which can be effectively bounded by distance.