| Some definitions of interest. | |
| eq_hanoi_PEG |  q == if p=q  true  ; false  fi | 
|  p,q:Peg. (p=  q)    | |
| hanoi_otherpeg | |
|  x,y:Peg. x  y   otherPeg(x; y)  Peg | |
| inject |  a1,a2:A. f(a1) = f(a2)  B   a1 = a2 | 
|  A,B:Type, f:(A   B). Inj(A; B; f)  Prop | |
| int_iseg |  | i  k & k  j } | 
|  i,j:  . {i...j}  Type | |
| nequal |  b  T ==  a = b  T | 
|  A:Type, x,y:A. (x  y)  Prop | 
About:
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