Nuprl Lemma : binrel_eqv_functionality_wrt_breqv 13,42

T:Type, aa'bb':(TT).
(a <>{Tb (a' <>{Tb' ((a <>{Ta' (b <>{Tb')) 
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Upgen algebra 1
Definitionsx,yt(x;y), t  T, , x:AB(x), P  Q, Trans(T;x,y.E(x;y)), Sym(T;x,y.E(x;y)), Refl(T;x,y.E(x;y)), P & Q, EquivRel(T;x,y.E(x;y)), {T}, x(s1,s2)
Lemmasbinrel eqv wf, equiv rel self functionality, binrel eqv weakening, binrel eqv inversion, binrel eqv transitivity

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