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Inverse is the opposite of something. This word and its derivatives are used greatly in mathematics, as illustrated below.
- Inverse element of an element x with respect to a binary operation * with identity element e is an element y such that x * y = y * x = e. In particular,
- the additive inverse of x is –x;
- the multiplicative inverse of x is x–1.
- Inverse function — inverse element with respect to function composition: a function that "reverses" the action of a given function: f–1(f(x)) = x.
- Inversion in a point — a geometric transform.
- Circle inversion — another particular geometric transformation of a plane that maps the outside of a circle to the inside and vice-versa.
- Inverse limit — a notion in abstract algebra.
- Inverse (logic) — ~p → ~q is the inverse of p → q.
- Inverse matrix — inverse element with respect to matrix multiplication.
- Pseudoinverse, a generalization of the inverse matrix.
- Inverse proportion, also inversely proportional — a relationship between two variables x and y characterized by the equation y = k / x.
- Inverse problem — the task of identifying model parameters from observed data; see for example
- Inverse perspective — the further the objects, the larger they are drawn.
- Inversive ring geometry — classical projective geometry extended by ring theory
- Inverse-square law — the magnitude of a force is proportional to the inverse square of the distance.
- Inverse transform sampling method — generate some random numbers according to a given probability distribution.
- Inverse chain rule method — related to integration and differentiation.
- Inversion of elements, a pair of adjacent out-of-order elements of a permutation (viewed as a list).
- Inverse relation
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- This page was last modified on 29 September 2008, at 17:37.
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