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

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

Definitions num thy 1 Sections StandardLIB Doc