Normal binary graph models

Details Normal binary graph models Normal binary graph models

2009-06-09

arxiv.org/abs/0906.1784v1

Mathematics

Combinatorics

8 pages

Scientific paper

We show that the marginal semigroup of a binary graph model is normal if and
only if the graph is free of K_4 minors. The technique, based on the interplay
of normality and the geometry of the marginal cone, has potential applications
to other normality questions in algebraic statistics.

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