Definitions int 2 Sections StandardLIB Doc
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Some definitions of interest.
iffDef P  Q == (P  Q) & (P  Q)
Thm* A,B:Prop. (A  B Prop
iminDef imin(a;b) == if ab a else b fi
Thm* a,b:. imin(a;b 
leDef AB == B<A
Thm* i,j:. (ij Prop

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ifthenelseintless_thanmemberpropimpliesandall!abstraction
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions int 2 Sections StandardLIB Doc