dcf — double coprime factorization
[N,M,X,Y,NT,MT,XT,YT]=dcf(G,[polf,polc,[tol]])
syslin list (continuous-time linear system)
respectively the poles of XT and YT and the poles of N and M (default values =-1).
real threshold for detecting stable poles (default value 100*%eps).
linear systems represented by syslin lists