is mentioned by

Thm*  (Set:Type, :(SetSetProp). Thm*  (P:(SetProp). p:Set. x:Set. (x  p)  P(x))	[RussellsParadox_Frege2]
Thm*  (A Discrete)  (e:(AA). x,y:A. (x e y)  x = y)	[discrete_vs_bool]

In prior sections: quot 1 rel 1

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