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Elementary matrix information


In mathematics, an elementary matrix is a matrix which differs from the identity matrix by one single elementary row operation. The elementary matrices generate the general linear group GLn(F) when F is a field. Left multiplication (pre-multiplication) by an elementary matrix represents elementary row operations, while right multiplication (post-multiplication) represents elementary column operations.

Elementary row operations are used in Gaussian elimination to reduce a matrix to row echelon form. They are also used in Gauss–Jordan elimination to further reduce the matrix to reduced row echelon form.

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Elementary matrix

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mathematics, an elementary matrix is a matrix which differs from the identity matrix by one single elementary row operation. The elementary matrices generate...

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Identity matrix

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Binary matrix (zero-one matrix) Elementary matrix Exchange matrix Matrix of ones Pauli matrices (the identity matrix is the zeroth Pauli matrix) Householder...

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Involutory matrix

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classes of elementary matrix is involutory, namely the row-interchange elementary matrix. A special case of another class of elementary matrix, that which...

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Block matrix

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In mathematics, a block matrix or a partitioned matrix is a matrix that is interpreted as having been broken into sections called blocks or submatrices...

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Gaussian elimination

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invertible matrix. The method is named after Carl Friedrich Gauss (1777–1855). To perform row reduction on a matrix, one uses a sequence of elementary row operations...

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Diagonal matrix

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In linear algebra, a diagonal matrix is a matrix in which the entries outside the main diagonal are all zero; the term usually refers to square matrices...

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Shear mapping

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a shear matrix or transvection, an elementary matrix that represents the addition of a multiple of one row or column to another. Such a matrix may be derived...

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Orthogonal matrix

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In linear algebra, an orthogonal matrix, or orthonormal matrix, is a real square matrix whose columns and rows are orthonormal vectors. One way to express...

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Unitary matrix

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In linear algebra, an invertible complex square matrix U is unitary if its matrix inverse U−1 equals its conjugate transpose U*, that is, if U ∗ U = U...

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Invertible matrix

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expressed as a finite product of elementary matrices. Furthermore, the following properties hold for an invertible matrix A: ( A − 1 ) − 1 = A {\displaystyle...

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Augmented matrix

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-dimensional matrix A {\displaystyle A} . This is usually done for the purpose of performing the same elementary row operations on the augmented matrix ( A |...

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Row echelon form

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column. The reduced row echelon form of a matrix is unique and does not depend on the sequence of elementary row operations used to obtain it. The variant...

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Frobenius matrix

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A Frobenius matrix is a special kind of square matrix from numerical analysis. A matrix is a Frobenius matrix if it has the following three properties:...

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Adjugate matrix

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adjugate of a square matrix A is the transpose of its cofactor matrix and is denoted by adj(A). It is also occasionally known as adjunct matrix, or "adjoint"...

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Special linear group

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(Conder, Robertson & Williams 1992, p. 19). Let Tij := eij(1) be the elementary matrix with 1's on the diagonal and in the ij position, and 0's elsewhere...

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Matrix similarity

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the elementary divisors of A; these can be immediately read off from a matrix in Jordan form, but they can also be determined directly for any matrix by...

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CW complex

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one replaces Tietze moves for the fundamental group presentation by elementary matrix operations for the presentation matrices for H n ( X ; Z ) {\displaystyle...

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Determinant

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square matrix. The determinant of a matrix A is commonly denoted det(A), det A, or |A|. Its value characterizes some properties of the matrix and the...

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Square root of a matrix

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square root of a matrix extends the notion of square root from numbers to matrices. A matrix B is said to be a square root of A if the matrix product BB is...

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Rotation matrix

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rotation matrix is a transformation matrix that is used to perform a rotation in Euclidean space. For example, using the convention below, the matrix R = [...

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List of named matrices

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matrices used in mathematics, science and engineering. A matrix (plural matrices, or less commonly matrixes) is a rectangular array of numbers called entries...

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Eco

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Internet industry association Elementary column operations, an operation performed on the columns of an elementary matrix in mathematics Engineering change...

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ERO

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operator in genetic algorithms Elementary row operations, an operation performed on the rows of an elementary matrix in mathematics Ero (spider), a genus...

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Definite matrix

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definiteness of a symmetric real matrix. Namely, the matrix is reduced to an upper triangular matrix by using elementary row operations, as in the first...

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Matrix exponential

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In mathematics, the matrix exponential is a matrix function on square matrices analogous to the ordinary exponential function. It is used to solve systems...

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