tsa
VarmaPoly.
getisinvertible
check whether the auto-regressive lag-polynomial is stationary
isinvertible : boolean
attaches
maeigenvalues : complex array
eigenvalues sorted by absolute value
References
formula taken from NAG manual
statsmodels.tsa.varma_process.VarmaPoly
statsmodels.tsa.varma_process.VarmaPoly.getisstationary
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