UMAP: Uniform Manifold Approximation and Projection for Dimension Reduction January 2020 tl;dr: A better non-linear dimension reduction technique than t-SNE. Can be used for data preprocessing as well, like PCA. Overall impression Describe the overall impression of the paper. Key ideas Summaries of the key ideas Technical details Summary of technical details Notes video UMAP vs t-SNE How UMAP works 3D animation: Understanding UMAP