in linear algebra, matrix multiplication is a binary operation that produces a matrix from two matrices. For matrix multiplication, the number of columns...
41 KB (6,581 words) - 13:39, 28 February 2025
Because matrix multiplication is such a central operation in many numerical algorithms, much work has been invested in making matrix multiplication algorithms...
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complexity of matrix multiplication dictates how quickly the operation of matrix multiplication can be performed. Matrix multiplication algorithms are a central...
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Matrix chain multiplication (or the matrix chain ordering problem) is an optimization problem concerning the most efficient way to multiply a given sequence...
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and multiplication. Most commonly, a matrix over a field F {\displaystyle F} is a rectangular array of elements of F {\displaystyle F} . A real matrix and...
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then the inverse of the example matrix should be used, which coincides with its transpose. Since matrix multiplication has no effect on the zero vector...
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Strassen algorithm (category Matrix multiplication algorithms)
Volker Strassen, is an algorithm for matrix multiplication. It is faster than the standard matrix multiplication algorithm for large matrices, with a...
26 KB (3,526 words) - 16:05, 13 January 2025
denotes the n-by-n identity matrix and the multiplication used is ordinary matrix multiplication. If this is the case, then the matrix B is uniquely determined...
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are referred to as matrix norms. Matrix norms differ from vector norms in that they must also interact with matrix multiplication. Given a field K ...
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Left multiplication (pre-multiplication) by an elementary matrix represents elementary row operations, while right multiplication (post-multiplication) represents...
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the minimum of its arguments. The following is an example of matrix vector multiplication. There are three arrays, each with 100 elements. The code does...
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n} matrix, it is a property of matrix multiplication that I m A = A I n = A . {\displaystyle I_{m}A=AI_{n}=A.} In particular, the identity matrix serves...
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Hadamard product (matrices) (redirect from Hadamard multiplication)
a matrix of the multiplied corresponding elements. This operation can be thought as a "naive matrix multiplication" and is different from the matrix product...
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kernel of DNN is large sparse-dense matrix multiplication. In the field of numerical analysis, a sparse matrix is a matrix populated primarily with zeros as...
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5\end{smallmatrix}}\right]} . In geometry, a diagonal matrix may be used as a scaling matrix, since matrix multiplication with it results in changing scale (size)...
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Cross product (redirect from Cross product matrix)
of a determinant of a special 3 × 3 matrix. According to Sarrus's rule, this involves multiplications between matrix elements identified by crossed diagonals...
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under matrix addition and matrix multiplication since matrix multiplication is associative. Three-dimensional Euclidean space with multiplication given...
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property of matrix multiplication that I m A = A I n = A {\displaystyle I_{m}A=AI_{n}=A} for any m × n {\displaystyle m\times n} matrix A {\displaystyle...
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Galactic algorithm (section Matrix multiplication)
first improvement over brute-force matrix multiplication (which needs O ( n 3 ) {\displaystyle O(n^{3})} multiplications) was the Strassen algorithm: a recursive...
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matrix, binary matrix, relation matrix, Boolean matrix, or (0, 1)-matrix is a matrix with entries from the Boolean domain B = {0, 1}. Such a matrix can...
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Kernel (linear algebra) (redirect from Kernel (matrix))
then x + y ∈ Null(A). This follows from the distributivity of matrix multiplication over addition. If x ∈ Null(A) and c is a scalar c ∈ K, then cx ∈...
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Basic Linear Algebra Subprograms (redirect from General Matrix Multiply)
operations such as vector addition, scalar multiplication, dot products, linear combinations, and matrix multiplication. They are the de facto standard low-level...
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Multiplication is one of the four elementary mathematical operations of arithmetic, with the other ones being addition, subtraction, and division. The...
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which can be applied to a signal through matrix multiplication. An N-point DFT is expressed as the multiplication X = W x {\displaystyle X=Wx} , where x...
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and practical. The n × n orthogonal matrices form a group under matrix multiplication, the orthogonal group denoted by O(n), which—with its subgroups—is...
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(\max(mkn/M^{1/2},mk+kn+mk))} . This lower bound is achievable by tiling matrix multiplication. More general results for other numerical linear algebra operations...
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Backpropagation (section Matrix multiplication)
The overall network is a combination of function composition and matrix multiplication: g ( x ) := f L ( W L f L − 1 ( W L − 1 ⋯ f 1 ( W 1 x ) ⋯ ) ) {\displaystyle...
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Associative property (redirect from Associative multiplication)
operation. However, operations such as function composition and matrix multiplication are associative, but not (generally) commutative. Associative operations...
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Combinations of bras, kets, and linear operators are interpreted using matrix multiplication. If C n {\displaystyle \mathbb {C} ^{n}} has the standard Hermitian...
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Locality of reference (section Matrix multiplication)
they are becoming somewhat more complicated. A common example is matrix multiplication: for i in 0..n for j in 0..m for k in 0..p C[i][j] = C[i][j] + A[i][k]...
16 KB (2,326 words) - 01:24, 19 November 2023