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variable to be summed out.

After eliminating , its reference is excluded and we are left with a distribution only over the remaining variables and the sum of each instantiation.

The resulting distribution which follows the sum-out operation only helps to answer queries that do not mention . Also worthy to note, the summing-out operation is commutative.

Factor Multiplication

Computing a product between multiple factors results in a factor compatible with a single instantiation in each factor.

Algorithm

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