Everything about Identity Matrix totally explained
In
linear algebra, the
identity matrix or
unit matrix of size
n is the
n-by-
n square matrix with ones on the
main diagonal and zeros elsewhere. It is denoted by
In, or simply by
I if the size is immaterial or can be trivially determined by the context. (In some fields, such as
quantum mechanics, the identity matrix is denoted by a boldface one,
1; otherwise it's identical to
I.)
»
The identity matrix also has the property that, when it's the product of two square matrices, the matrices can be said to be the inverse of one another.
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