Definitions hol arithmetic 1 Sections HOLlib Doc
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Some definitions of interest.
natDef  == {i:| 0i }
Thm*   Type
Thm*   S
oddDef odd(n) == if n=0 then false else odd(n-1) fi   (recursive)
Thm* n:. odd(n 

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

Definitions hol arithmetic 1 Sections HOLlib Doc