Nuprl Lemma : R-Feasible-Rplus 11,40

A,B:top.
sqequal(R-Feasible{i:l}
sqequal(R-Feasible(Rplus(A; B));
sqequal((R-Feasible{i:l}(A)  R-Feasible{i:l}(B)  R-compat{i:l}(A; B))) 
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Definitionst  T, R-Feasible{i:l}(R), x:A. B(x)
Lemmastop wf

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