Recurrence

Recurrence and recurrent may refer to:
 * Disease recurrence, also called "relapse"
 * Eternal recurrence, the concept that the universe is perpetually recurring
 * Historic recurrence, the repetition of similar events in history
 * Poincaré recurrence theorem, Henri Poincaré's theorem on dynamical systems
 * Radial recurrent artery – arising from the radial artery immediately below the elbow
 * Recursive definition
 * Recurrent neural network, a special artificial neural network
 * Recurrence period density entropy, an information-theoretic method for summarising the recurrence properties of dynamical systems
 * Recurrence plot, a statistical plot that shows a pattern that re-occurs
 * Recurrence relation, an equation which defines a sequence recursively
 * Recurrent rotation, a term used in contemporary hit radio for frequently aired songs
 * Recurrence The Railway Children (band) album