Return the commutation matrix which is the unique matrix such that for all matrices If only one argument m is given, is returned. See Magnus and Neudecker (1988), Matrix differential calculus with applications in statistics and econometrics.
Return the commutation matrix which is the unique matrix such that for all matrices
If only one argument m is given, is returned.
See Magnus and Neudecker (1988), Matrix differential calculus with applications in statistics and econometrics.