Definitions num thy 1 Sections StandardLIB Search Doc
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Some definitions of interest.
assocedDef a ~ b == a | b & b | a
Thm* a,b:. (a ~ b Prop
dividesDef b | a == c:a = bc
Thm* a,b:. (a | b Prop
int_nzeroDef  == {i:i  0 }
Thm*   Type

About:
intnatural_numbermultiplysetuniverseequalmember
propandallexists!abstraction
IF YOU CAN SEE THIS go to http://www.cs.cornell.edu/Info/People/sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions num thy 1 Sections StandardLIB Search Doc