what is wide sense in a math program is an arma process stationary why is ARMA non-causal which condition does a arma process need to be what is the difference between wide sense stationary and non-causal what is the condition for a wide sense stationary arma process what is wide sense stationary what is the condition for wide sense what is a wide sense stationary arma process is a time series wide sense stationary what is the characteristic of the arma process? why is arma stationary which arithmetic term is a stationary process why is arma stationary how many magnitudes in a ARMA what is wide sense stationary what is wide sense how is a arma process defined why is ar process non-causal and wide sense stationary? when a process is wide sense stationary what is the root of its ari polynomial