Periodicity or periodic may refer to:
Mathematics
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Bott periodicity theorem, addresses Bott periodicity: a modulo-8 recurrence relation in the homotopy groups of classical groups
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Periodic function
A periodic function is a function that repeats its values at regular intervals. For example, the trigonometric functions, which repeat at intervals of 2\pi radians, are periodic functions. Periodic functions are used throughout science to desc ...
, a function whose output contains values that repeat periodically
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Periodic mapping
Physical sciences
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Periodic table
The periodic table, also known as the periodic table of the (chemical) elements, is a rows and columns arrangement of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of ch ...
of chemical elements
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Periodic trends, relative characteristics of chemical elements observed
* Redshift periodicity, astronomical term for
redshift quantization
Other uses
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Fokker periodicity blocks, which mathematically relate musical intervals
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Periodic acid, a compound of iodine
* Principle of periodicity, a concept in
generally accepted accounting principles
Publicly traded companies typically are subject to rigorous standards. Small and midsized businesses often follow more simplified standards, plus any specific disclosures required by their specific lenders and shareholders. Some firms operate on th ...
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Quasiperiodicity, property of a system that displays irregular periodicity
See also
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Aperiodic (disambiguation)
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Cycle (disambiguation)
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Frequency (disambiguation)
Frequency refers to how often an event occurs within a given period.
Frequency may also refer to:
Entertainment
* ''Frequency'' (2000 film), a film starring Jim Caviezel and Dennis Quaid
* ''Frequency'' (2019 film), a Burmese horror film
* ''Fr ...
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Period (disambiguation)
Period may refer to:
Common uses
* Era, a length or span of time
* Full stop (or period), a punctuation mark
Arts, entertainment, and media
* Period (music), a concept in musical composition
* Periodic sentence (or rhetorical period), a concept ...
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Periodical
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Seasonality, periodic variation, or periodic fluctuations
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