WhoCites Definitions hol num Sections HOLlib Doc
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Who Cites hexists?
hexistsDef exists == p:'ax:'a. (p(x))
Thm* 'a:S. exists  (('a  hbool)  hbool)
bexistsDef x:TP(x) == (x:TP(x))
Thm* T:Type, P:(T). (x:TP(x))  
tlambdaDef (x:Tb(x))(x) == b(x)
assertDef b == if b True else False fi
Thm* b:b  Prop
prop_to_boolDef P == InjCase(lem(P) ; true; false)
Thm* P:Prop. (P 

Syntax:exists has structure: hexists('a)

About:
boolbfalsebtrueifthenelseassertdecideapply
functionuniversememberpropfalsetrueallexists!abstraction
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WhoCites Definitions hol num Sections HOLlib Doc