Matrix Inverse -- from Wolfram MathWorld

where is the identity matrix.Courant and Hilbert (1989, p. 10) use the notation to denote the inverse matrix.. A square matrix has an inverse iff the determinant (Lipschutz 1991, p. 45). The so-called invertible matrix theorem is major result in linear algebra which associates the existence of a matrix inverse with a number of other equivalent properties.

Inverse | Definition of Inverse by Merriam-Webster

3 a: inverse function also: an operation (such as subtraction) that undoes the effect of another operation. b: a set element that is related to another element in such a way that the result of applying a given binary operation to them is an identity element of the set

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Fast inverse square root - Wikipedia

Fast inverse square root, sometimes referred to as Fast InvSqrt() or by the hexadecimal constant 0x5F3759DF, is an algorithm that estimates 1 ⁄ √ x, the reciprocal (or multiplicative inverse) of the square root of a 32-bit floating-point number x in IEEE 754 floating-point format.This operation is used in digital signal processing to normalize a vector, i.e., scale it to length 1.

IXL - Inverse of a matrix (Algebra 2 practice)

Improve your math knowledge with free questions in "Inverse of a matrix" and thousands of other math skills.

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This calculator was first developed for students to demonstrate the inverse square law principal from radiation physics.

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tf–idf - Wikipedia

The inverse document frequency is a measure of how much information the word provides, i.e., if it's common or rare across all documents. It is the logarithmically scaled inverse fraction of the documents that contain the word (obtained by dividing the total number of documents by the number of documents containing the term, and then taking the logarithm of that quotient):

Tetris Inversé - stratozor.com

Tetris inversé. Alignez 4 briques de la même couleur pour les faire disparaitre. Contrôles : Déplacer les blocs.

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