Involution may refer to:
Mathematics
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Involution (mathematics)
In mathematics, an involution, involutory function, or self-inverse function is a function that is its own inverse,
:
for all in the domain of . Equivalently, applying twice produces the original value.
General properties
Any involution ...
, a function that is its own inverse
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Involution algebra, a *-algebra: a type of algebraic structure
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Involute
In mathematics, an involute (also known as an evolvent) is a particular type of curve that is dependent on another shape or curve. An involute of a curve is the Locus (mathematics), locus of a point on a piece of taut string as the string is eith ...
, a construction in the differential geometry of curves
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Exponentiation
In mathematics, exponentiation, denoted , is an operation (mathematics), operation involving two numbers: the ''base'', , and the ''exponent'' or ''power'', . When is a positive integer, exponentiation corresponds to repeated multiplication ...
(archaic use of the term)
Other uses
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Involution (medicine), the shrinking of an organ (such as the uterus after pregnancy)
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Neijuan, or involution, a Chinese social concept
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Agricultural Involution
''Agricultural Involution: The Processes of Ecological Change in Indonesia'' is one of the most famous of the early works of Clifford Geertz. Its principal thesis is that many centuries of intensifying wet-rice cultivation in Indonesia had produc ...
'', a 1963 study of intensification of production through increased labour inputs
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Involution (esoterism)
The term involution has various meanings. In some instances it refers to a process prior to evolution which gives rise to the cosmos, in others it is an aspect of evolution, and in still others it is a process that follows the completion of evoluti ...
, several notions of a counterpart to evolution
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Involution (Meher Baba), the inner path of the human soul to the self as described by Meher Baba
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Involution (Sri Aurobindo), term in the philosophy of Sri Aurobindo
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''Involution'' (album), a 1998 music album by Michael Marcus and the Jaki Byard trio
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