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A derivation of the Dirac equation in `3+1' dimensions is presented based ona master equation approach originally developed for the `1+1' problem by McKeonand Ord. The method of derivation presented here suggests a mechanism by whichthe work of Knuth and Bahrenyi on causal sets may be extended to a derivationof the Dirac equation in the context of an inference problem.

A Master Equation Approach to the `3 + 1' Dirac Equation