| Some definitions of interest. |
|
hanoi_seq | Def s is a Hanoi(n disk) seq on a..z
Def == x,x':{a...z}.
Def == x+1 = x'  ( k:{1...n}. Moving disk k of n takes s(x) to s(x')) |
| | Thm* n: , a,z: , s:({a...z} {1...n} Peg).
Thm* s is a Hanoi(n disk) seq on a..z Prop |
|
hanoi_PEG | Def Peg == {1...3} |
| | Thm* Peg Type |
|
int_iseg | Def {i...j} == {k: | i k & k j } |
| | Thm* i,j: . {i...j} Type |
|
int_upper | Def {i...} == {j: | i j } |
| | Thm* n: . {n...} Type |
|
nat_plus | Def  == {i: | 0<i } |
| | Thm*  Type |
|
nequal | Def a b T == a = b T |
| | Thm* A:Type, x,y:A. (x y) Prop |