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Published online by Cambridge University Press: 12 March 2014
If C1, …, Ck are members of a certain class of suitable categories (which contains those arising from models with dimension), C = C1 × … × Ck, C′ is a suitable category, F: C → C′ is a partial recursive combinatorial functor satisfying a certain property (which, if C = C1, is that F is nonconstant) and ∈ C, then (1) if F
is regressive so is
as is each
i, and (2) if F
is Dedekind then each
i is Dedekind.