Definitions core StandardLIB Doc
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html
Some definitions of interest.
uni_satDef a = !x:TQ(x) == Q(a) & (a':TQ(a' a' = a)
Thm* T:Type, a:TQ:(TProp). (a = !x:TQ(x))  Prop
unique_setDef {!x:T | P(x)} == {x:TP(x) & (y:TP(y y = x) }
Thm* T:Type, P:(TProp). {!x:T | P(x)}  Type

About:
setfunctionuniverseequalmember
propimpliesandall!abstraction
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions core StandardLIB Doc