New progress in enumeration of mixed models.
Roman Bayon, Nik Lygerōs, Jean‐Sébastien Sereni · Applied Mathematics E-Notes [electronic only] · 2005
A mixed model is said to be constrained if none of its fixed factors is nested within a random factor. Hess and Iyer have asked the question of enumerating non-isomorphic mixed models (with or without constraint), solving the problem for mixed models of size at most 5. In this article, using previous results about posets, we present a new algorithm, and obtain results for mixed models of size at most 10.