Definitions hol Sections HOLlib Doc
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Some definitions of interest.
iffDef P  Q == (P  Q) & (P  Q)
Thm* A,B:Prop. (A  B Prop
tlambdaDef (x:Tb(x))(x) == b(x)

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applymemberpropimpliesandall!abstraction
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions hol Sections HOLlib Doc