We introduce equivariant tree models in algebraic statistics, which unify and generalise existing tree models such as the general Markov model, the strand symmetric model, and group based models. We focus on the ideals of such models. We show how the ideals for general trees can be determined from the ideals for stars. The main novelty is our proof that this procedure yields the entire ideal, not just an ideal defining the model set-theoretically. A corollary of theoretical importance is that the ideal for a general tree is generated by the ideals of its flattenings at vertices.
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Cornell University Library
arXiv.org e-Print archive
Networks and Optimization

Draisma, J, & Kuttler, J. (2008). On the ideals of equivariant tree models. arXiv.org e-Print archive. Cornell University Library .