Nuprl Lemma : refl_cl_sp_cancel 13,42

T:Type, r:(TT).
dec_binrel(T;x,y:T. x = y  T)  refl(T;r)  anti_sym(T;r)  (((r\)) <>{T} r) 
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Upgen algebra 1
Definitionsx,y. t(x;y), t  T, P  Q, , x:A. B(x), x(s1,s2)
Lemmasab binrel wf, dec binrel wf, xxrefl wf, xxanti sym wf, s part wf, refl cl wf, binrel le antisymmetry, refl cl sp le rel, rel le refl cl sp

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