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Identity matrix
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單位矩陣 (Identity matrix)

简介

在線性代數中,n階單位矩陣,是一個n\times n的方形矩陣,其主對角線元素為1,其餘元素為0。單位矩陣以I_n表示;如果階數可忽略,或可由前後文確定的話,也可簡記為I。 维基百科

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In linear algebra, the identity matrix of size n is the n × n square matrix with ones on the main diagonal and zeros elsewhere. It is denoted by In, ...
Definition of identity matrix ... The n × n n\times n n×nn, times, n identity matrix, denoted I n I_n In​I, start subscript, n, end ...
Identity matrix(来源:www.khanacademy.org)
An identity matrix is a given square matrix of any order which contains on its main diagonal elements with value of one, while the rest of the matrix ...
An identity matrix is a square matrix having 1s on the main diagonal, and 0s everywhere else. For example, the 2×2 and 3×3 identity matrices are shown below.
Matrix I is the identity matrix, a matrix in which diagonal elements have values of 1 and off-diagonal elements values of 0. If A is a matrix then we speak of A ...
Identity matrices are identities with respect to vector multiplication in matrix spaces. ... Identity matrices can also be formed using the SparseArray function ...
作者:EW Weisstein2003被引用次数:2 — , with a subscript sometimes used to indicate the dimension of the matrix. Identity matrices are sometimes also known as unit matrices (Akivis and Goldberg 1972 ...

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