Article,

Racing algorithms for conditional independence inference

, and .
Int. J. Approx. Reasoning, 45 (2): 386-401 (2007)

Abstract

In this article, we consider the computational aspects of deciding whether a conditional independence statement $t$ is implied by a list of conditional independence statements $L$ using the implication related to the method of structural imsets. We present two methods which have the interesting complementary properties that one method performs well to prove that $t$ is implied by $L$, while the other performs well to prove that $t$ is not implied by $L$. However, both methods do not well perform the opposite. This gives rise to a parallel algorithm in which both methods race against each other in order to determine effectively whether $t$ is or is not implied. Some empirical evidence is provided that suggest this racing algorithms method performs considerably better than an existing method based on so-called skeletal characterization of the respective implication. Furthermore, unlike previous methods, the method is able to handle more than five variables.

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