Nuprl Lemma : ma-compat-symmetry 0,22

AB:MsgA. (A ||+ B (B ||+ A
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Definitionst  T, P  Q, x:AB(x), MsgA, ma-frame-compatible(A;B), M1 || M2, x:AB(x), Prop, P & Q, A ||+ B
Lemmasma-compatible wf, ma-frame-compatible wf, msga wf, ma-frame-compatible symmetry, ma-compatible-symmetry

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