Backshift operator
= Backshift operator
{title2=$B$}
The backshift operator acts on a time series by $BX_t=X_{t-1}$ and hence $B^jX_t=X_{t-j}$.
= Backshift operator
{title2=$B$}
The backshift operator acts on a time series by $BX_t=X_{t-1}$ and hence $B^jX_t=X_{t-j}$.