Uncertainty in Artificial Intelligence
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Evidence Absorption and Propagation through Evidence Reversals
Ross Shachter
The arc reversal/node reduction approach to probabilistic inference is extended to include the case of instantiated evidence by an operation called "evidence reversal." This not only provides a technique for computing posterior joint distributions on general belief networks, but also provides insight into the methods of Pearl [1986b] and Lauritzen and Spiegelhalter [1988]. Although it is well understood that the latter two algorithms are closely related, in fact all three algorithms are identical whenever the belief network is a forest.
Pages: 303-310
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PDF Link: /papers/89/p303-shachter.pdf
AUTHOR = "Ross Shachter ",
TITLE = "Evidence Absorption and Propagation through Evidence Reversals",
BOOKTITLE = "Proceedings of the Fifth Conference Annual Conference on Uncertainty in Artificial Intelligence (UAI-89)",
ADDRESS = "Corvallis, Oregon",
YEAR = "1989",
PAGES = "303--310"

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