Is SARIMAX a deterministic algorithm? SARIMAX is a well-known algorithm for time series forecasting.
But I'm not sure if it is deterministic or non-deterministic.
Could you help me?

SARIMAX is first a model, which can then be used for forecasting, but also for other uses.
SARIMAX is completely deterministic in the usual implementations: if you run it multiple times with the same input, you will get the same output each time. (You could in principle use randomization in your search for AR and MA orders, but I don't know of anyone who advocates this.)
