Recurrence and recurrent may refer to: *''Disease recurrence'', also called

relapse In internal medicine, relapse or recidivism is a recurrence of a past (typically medical) condition. For example, multiple sclerosis and malaria often exhibit peaks of activity and sometimes very long periods of dormancy, followed by relapse or ...

*''Eternal recurrence'', or

eternal return Eternal return (german: Ewige Wiederkunft; also known as eternal recurrence) is a concept that the universe and all existence and energy has been recurring, and will continue to recur in a self similar form an infinite number of times across i ...

, the concept that the universe has been recurring, and will continue to recur, in a self-similar form an infinite number of times across infinite time or space *

Historic recurrence Historic recurrence is the repetition of similar events in history. The concept of historic recurrence has variously been applied to overall human history (e.g., to the rises and falls of empires), to repetitive patterns in the history of a give ...

, the repetition of similar events in history * Poincaré recurrence theorem, Henri Poincaré's theorem on dynamical systems *

Radial recurrent artery The radial recurrent artery arises from the radial artery immediately below the elbow. It ascends between the branches of the radial nerve, lying on the supinator muscle and then between the brachioradialis muscle and the brachialis muscle, supp ...

– arising from the radial artery immediately below the elbow *

Recursive definition In mathematics and computer science, a recursive definition, or inductive definition, is used to define the elements in a set in terms of other elements in the set ( Aczel 1977:740ff). Some examples of recursively-definable objects include facto ...

Recurrent neural network A recurrent neural network (RNN) is a class of artificial neural networks where connections between nodes can create a cycle, allowing output from some nodes to affect subsequent input to the same nodes. This allows it to exhibit temporal dynamic ...

, a special artificial neural network *

Recurrence period density entropy Recurrence period density entropy (RPDE) is a method, in the fields of dynamical systems, stochastic processes, and time series analysis, for determining the periodicity, or repetitiveness of a signal. Overview Recurrence period density entropy i ...

, an information-theoretic method for summarising the recurrence properties of dynamical systems *

Recurrence plot In descriptive statistics and chaos theory, a recurrence plot (RP) is a plot showing, for each moment i in time, the times at which the state of a dynamical system returns to the previous state at i, i.e., when the phase space trajectory visits roug ...

, a statistical plot that shows a pattern that re-occurs *

Recurrence relation In mathematics, a recurrence relation is an equation according to which the nth term of a sequence of numbers is equal to some combination of the previous terms. Often, only k previous terms of the sequence appear in the equation, for a parameter ...

, an equation which defines a sequence recursively *

Recurrent rotation In broadcasting, rotation is the repeated airing of a limited playlist of songs on a radio station or satellite radio channel, or music videos on a TV network. They are usually in a different order each time. However, they are not completely sh ...

, a term used in contemporary hit radio for frequently aired songs *''Recurrence''

The Railway Children (band) The Railway Children are a British new wave band, formed in Wigan in 1984, by Gary Newby (songwriter/vocals/guitar/keyboards), Brian Bateman (rhythm/guitar), Guy Keegan (drums), and Stephen Hull (bass). Career Factory Records recorded their ...

album

See also