Definitions hol num Sections HOLlib Doc
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Some definitions of interest.
decidableDef Dec(P) == P  P
Thm* A:Prop. Dec(A Prop
natDef  == {i:| 0i }
Thm*   Type
Thm*   S
notDef A == A  False
Thm* A:Prop. (A Prop

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

Definitions hol num Sections HOLlib Doc