Abstract
We show that there can be no finite list of conditional independence relations which can be used to deduce all conditional independence implications among Gaussian random variables. To do this, we construct, for each n > 3 a family of n conditional independence statements on n random variables which together imply that X 1 ⫫ X 2 , and such that no subset have this same implication. The proof relies on binomial primary decomposition.
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