factory= class=ARMALikelihoodFactory implementation=class= ARMAFactoryImplementation p=[2] current p=2 q=[1] current q=1 invertible=true dimension=2
original process =  ARMA(X_{0,t} - 0.5 X_{0,t-1} - 0.1 X_{1,t-1} = E_{0,t} - 0.4 E_{0,t-1}
X_{1,t} - 0.4 X_{0,t-1} - 0.5 X_{1,t-1} - 0.25 X_{0,t-2} = E_{1,t} - 0.4 E_{1,t-1}, E_t ~ Normal(mu = [0,0], sigma = [0.316228,0.447214], R = [[ 1 0 ]
 [ 0 1 ]]))
