Thanks to seeing my question,
I have problem to get Relative Gain Array (RGA) matrix for Laplacian matrix
Laplacian matrix contion : eigenvalue <= 0 alway has 0 eigenvalue,
I already get RGA matrix under the condition of matrix which is Positive definite, (eigenvalues >0 case - Not Laplacian)
RGA = G(0) * trans( G(0)^(-1) ).
when there is zero eigenvalue in transfer functuin G,
I can't calculate G(0), that goes to infinie,
So how can i get RGA when there is zero eigenvalue in Transfer function ???