Periodicity

Periodicity may refer to:

• Bott periodicity theorem, mathematical method of describing a periodicity in the homotopy groups of classical groups
• Fokker periodicity blocks, concept in tuning theory used to mathematically relate musical intervals
• Periodic function, a function whose output contains values that repeat periodically
• Periodic table, classification of chemical elements by means of the periodicity of their chemical properties
• Quasiperiodicity, property of a system that displays irregular periodicity
• Fourier series, mathematical term that decomposes any periodic function or periodic signal into a set of simple oscillating functions
• Principle of periodicity, in Generally Accepted Accounting Principles
• Redshift periodicity, astronomical term for Redshift quantization

See also

• 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
• Utility frequency, the frequency at which alternating current (AC) is transmitted from a power plant to the end user