Periodicity

Periodicity or periodic may refer to:

In mathematics

• Periodic function, a function whose output contains values that repeat periodically
• Periodic mapping
• Bott periodicity theorem, describing a periodicity in the homotopy groups of classical groups
• Fokker periodicity blocks, which mathematically relate musical intervals
• Quasiperiodicity, property of a system that displays irregular periodicity
• Fourier series, decomposition of any periodic function or periodic signal into a set of simple oscillating functions
• Periodogram, a method of spectral density estimation

In the physical sciences

• Periodic trends, relative characteristics of chemical elements observed
• Redshift periodicity, astronomical term for redshift quantization

In accounting

• Principle of periodicity, in generally accepted accounting principles

In music

• Period (music), groups of phrases consisting usually of at least one antecedent phrase and one consequent phrase

See also

• Aperiodic (disambiguation)
• Period (disambiguation)
• Cycle (disambiguation)
• Frequency (disambiguation)
• Seasonality, periodic variation, or periodic fluctuations
• Simultaneity (disambiguation)
• Synchronicity, experience of two or more events that are apparently causally unrelated occurring together in a meaningful manner