Def x:A. B(x) == x:AB(x)

is mentioned by

Thm* i,j:, F:({i..j}Prop). (k:{i..j}. Dec(F(k)))  Dec(k:{i..j}. F(k))	[decidable__ex_int_seg]
Thm* i,j:. Thm* i<j Thm*  Thm* (F:({i..j}Prop). (k:{i..j}. F(k))  F(i)  (k:{(i+1)..j}. F(k)))	[split_int_seg_exist_dom_sfa]
Thm* a:, n:. q:. Div(a;n;q) & (a  n) = q	[div_elim]
Def Rem(a;n;r) == q:. Div(a;n;q) & qn+r = a	[rem_nrel]

In prior sections: core

Try larger context: StandardLIB IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html