Definitions mb event system 6 Sections EventSystems Doc
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Some definitions of interest.
decidableDef Dec(P) == P  P
Thm* A:Prop. Dec(A Prop
finite-typeDef finite-type(T) == n:f:(nT). Surj(nTf)
iffDef P  Q == (P  Q) & (P  Q)
Thm* A,B:Prop. (A  B Prop
int_segDef {i..j} == {k:i  k < j }
Thm* m,n:. {m..n Type
natDef  == {i:| 0i }
Thm*   Type
surjectDef Surj(ABf) == b:Ba:Af(a) = b
Thm* A,B:Type, f:(AB). Surj(ABf Prop

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

Definitions mb event system 6 Sections EventSystems Doc