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Published online by Cambridge University Press: 12 March 2014
A partially ordered (p.o.) set (P, ≼) is represented by the recursively enumerable (r.e.) class C if (P, ≼) is order isomorphic to (C, ⊆), that is to the p.o. set consisting of C ordered by the inclusion relation. (P, ≼.) is representable if it is represented by some r.e. class. N will denote the set of natural numbers.
This work was supported in part by Canadian NRC grants A-3024, A-3040. It forms part of the author's doctoral dissertation at Simon Fraser University.