VarmaPoly.getisinvertible(a=None)
[source]
check whether the auto-regressive lag-polynomial is stationary
Returns: |
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formula taken from NAG manual
© 2009–2012 Statsmodels Developers
© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.tsa.varma_process.VarmaPoly.getisinvertible.html