Bregman divergences
2023-08-29 — 2023-08-29
Wherein a Measure of Separation Between Points Is Presented, Being Defined From a Strictly Convex Function, Exemplified by the Squared Euclidean Distance, and Being Employed in Mirror Descent.
In mathematics, specifically statistics and information geometry, a Bregman divergence or Bregman distance is a measure of difference between two points, defined in terms of a strictly convex function. They form an important class of divergences. When the points are interpreted as probability distributions — notably as either values of the parameter of a parametric model or as a data set of observed values — the resulting distance is a statistical distance.
Right, but why? This is not immediately intuitive, so I’ll handball to the many fine tutorials on the subject write than write a crappy explanation that helps no-one.
1 Generator of proper scoring rules
🚧TODO🚧
2 In contrastive learning
See contrastive divergence. 🚧TODO🚧
3 In Mirror descent
Used explicitly in mirror descent.
