Definitions hol bool Sections HOLlib Doc
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Some definitions of interest.
bchooseDef @x:'ap(x) == @x:'ap(x)
Thm* 'a:S, p:('a). (@x:'ap(x))  'a
assertDef b == if b True else False fi
Thm* b:b  Prop
chooseDef @x:TP(x) == InjCase(lem({x:TP(x) }); xx, arb(T))
Thm* T:S, P:(TType). (@x:TP(x))  T
stypeDef S == {T:Type| x:T. True }
Thm* S  Type{2}

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

Definitions hol bool Sections HOLlib Doc