Nuprl Lemma : divides_preorder 2,24

Preorder(;x,y.x | y
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DefinitionsPreorder(T;x,y.R(x;y)), Refl(T;x,y.E(x;y)), Trans x,y:TE(x;y), P & Q, P  Q, b | a, x:AB(x), t  T
Lemmasdivides transitivity, divides reflexivity, divides wf

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