MMDS- Stanford 2008 Harmonic Analysis, diffusion geometries and Multi Scale organizations of data and matrices. R.R Coifman Department of Mathematics,Yale.
Diffusion Geometries in Document Spaces. Multiscale Harmonic Analysis. R.R. Coifman, S. Lafon, A. Lee, M. Maggioni, B.Nadler. F. Warner, S. Zucker. Mathematics.