INV matrix function
INV(A) Returns the inverse matrix for the square matrix A.
The inverse A−1 of a square matrix A is the unique matrix such that:
That is, the inverse of A is the matrix A−1 that you have to multiply A by in order to obtain the identity matrix I.
Note that when the argument of the INV function is a real number x, then INV(x) returns x−1 or 1/x, so that analogously:
To invert all elements of a matrix A, use the function POWER(A,-1).
Matrix Algebra Useful for Statistics
Shayle R. Searle, Andre I. Khuri
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