VarmaPoly.getisstationary()

statsmodels.tsa.varma_process.VarmaPoly.getisstationary

VarmaPoly.getisstationary(a=None) [source]

check whether the auto-regressive lag-polynomial is stationary

Returns:	isstationary : boolean *attaches* : areigenvalues : complex array eigenvalues sorted by absolute value

References

formula taken from NAG manual