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 function whose output contains values that repeat periodically
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Periodic mapping
Physical sciences
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Periodic table of chemical elements
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Periodic trends, relative characteristics of chemical elements observed
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Redshift periodicity, astronomical term for redshift quantization
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Log-periodic antenna, type of broadband radio antenna
Other uses
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Fokker periodicity blocks, which mathematically relate musical intervals
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Periodic acid, a compound of iodine
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Principle of periodicity, a concept in generally accepted accounting principles
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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)
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Period (disambiguation)
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Periodical
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Seasonality, periodic variation, or periodic fluctuations