| Some definitions of interest. |
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eq_hanoi_PEG | Def p= q == if p=q true ; false fi |
| | Thm* p,q:Peg. (p= q)  |
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hanoi_otherpeg | Def otherPeg(x; y) == 6-(x+y) |
| | Thm* x,y:Peg. x y  otherPeg(x; y) Peg |
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inject | Def Inj(A; B; f) == a1,a2:A. f(a1) = f(a2) B  a1 = a2 |
| | Thm* A,B:Type, f:(A B). Inj(A; B; f) Prop |
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int_iseg | Def {i...j} == {k: | i k & k j } |
| | Thm* i,j: . {i...j} Type |
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nequal | Def a b T == a = b T |
| | Thm* A:Type, x,y:A. (x y) Prop |