Inverse

inv(input: any[] | Mat) : any[]

param input a 2d matrix. Should be square and invertible.

returns: any[] - The matrix that is the inverse of input i.e. input * input^-1 = I where I is the identity matrix. (recall identity matrix is 1's on the diagonal and 0's elsewhere)

This function simply finds the inverse of a matrix if its invertible. One test for invertible matrices is its invertible if determinant (det) =/= 0 :