- The harmonic mean of two independent Cauchy distributions is a Cauchy distribution (R code)
- Natural gradient in machine learning (collaborative blog by Wu Lin, Emtiyaz Khan, Mark Schmidt and me)
- Hilbert's simplex distance: A non-separable information monotone distance
- The Kullback-Leibler divergence between a Poisson distribution and a geometric distribution (from a generic formula for the KLD between two different exponential families)
- Cross-entropy, differential entropy and Kullback-Leibler divergence between Rayleigh distributions (some Java code that checks these formula RayleighCrossEntropy.java )
- Building an Apollonian circle packing (August 2020)
- 3D printing of the elliptope (space of 3x3 correlation matrices)
- Structures cannot be avoided! Ramsey theory on the intersection graphs of line segments
- Adaptive Algorithms: Revisiting Klee's measure problem...
- Thales' theorem in Mahalanobis geometry
- The alpha-representation of the Fisher Information Matrix (FIM)
- A note on kernelizing the smallest enclosing ball for machine learning
- A note on the Hyv¨arinen divergence between densities of an exponential family

(c) Frank Nielsen, Last updated October 2021.