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Who Cites b exists unique?
b_exists_uniqueDef b_exists_unique('a;x.p(x))
Def == (x:'ap(x))(x,y:'a.  (p(x)p(y))(x = y))
Thm* 'a:Type, p:('a). b_exists_unique('a;x.p(x))  
bequalDef x = y == (x = y  T)
Thm* T:Type, x,y:T. (x = y 
bandDef pq == if p q else false fi
Thm* p,q:. (pq 
bimpliesDef pq == p  q
Thm* p,q:pq  
ballDef x:TP(x) == (x:TP(x))
Thm* T:Type, P:(T). (x:TP(x))  
bexistsDef x:TP(x) == (x:TP(x))
Thm* T:Type, P:(T). (x:TP(x))  
prop_to_boolDef P == InjCase(lem(P) ; true; false)
Thm* P:Prop. (P 
bnotDef b == if b false else true fi
Thm* b:b  
borDef p  q == if p true else q fi
Thm* p,q:. (p  q 
assertDef b == if b True else False fi
Thm* b:b  Prop

Syntax:b_exists_unique('a;x.p(x)) has structure: b_exists_unique('ax.p(x))

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boolbfalsebtrueifthenelseassertdecideapply
functionuniverseequalmemberpropfalsetrueallexists
!abstraction
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WhoCites Definitions HOLlib Sections NuprlLIB Doc