2000/07/05 by Wlodzimierz Bryc
Mathematics · #math.PR #msc:60E99
published as Stoch. Proc. Appl. 93 (2001), pp. 339-348
arxiv created 2000/07/05 · arxiv updated 2009/11/30
In a previous paper we determined one dimensional distributions of a stationary field with linear regressions and quadratic conditional variances under a linear constraint on the coefficients of the quadratic expression. In this paper we show that for stationary Markov chains with linear regressions and quadratic conditional variances the coefficients of the quadratic expression are indeed tied by a linear constraint which can take only one of the two alternative forms.