Ian R. Dunkin has written:

'Matrix-isolation techniques' -- subject(s): Matrix isolation spectroscopy

It is the matrix 1/3

It is the matrix 1/3

It is the matrix 1/3

It is the matrix 1/3

To find the original matrix of an inverted matrix, simply invert it again. Consider

A^-1^-1 = A^1 = A

From Wolfram MathWorld:

The inverse of a square matrix A, sometimes called a reciprocal matrix, is a matrix A-1 such that

AA-1=I

where I is the identity matrix.

A Hadamard Matrix is a square matrix composed of 1 or -1. Using a square matrix system the hadamard matrix could be created