Definitions bool 1 Sections StandardLIB Doc
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Some definitions of interest.
eq_intDef i=j == if i=j true ; false fi
Thm* i,j:. (i=j 
nequalDef a  b  T == a = b  T
Thm* A:Type, x,y:A. (x  y Prop

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

Definitions bool 1 Sections StandardLIB Doc