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hanoi general exists lemma2PROGworks113 1. n :
2. a :
3. z : {a...}
4. m : {a...z-1}
5. f : {1...n}Peg
6. g : {1...n}Peg
7. f(n) g(n)
8. s1 : {a...m}{1...n-1}Peg
9. s2 : {m+1...z}{1...n-1}Peg
10. s1 is a Hanoi(n-1 disk) seq on a..m 11. s1(a) = f 12. s2 is a Hanoi(n-1 disk) seq on m+1..z 13. s2(z) = g 14. s1(m) = s2(m+1)
15. i:{1...n-1}. s1(m,i) f(n) & s2(m+1,i) g(n)
(s2(?) {to n-1} g {to n}) is a Hanoi(n disk) seq on m+1..z
By:
BackThru:
Thm*a,z:, n:, s:({a...z}{1...n}Peg), n':.
Thm* nn' Thm*
Thm* (h:({n+1...n'}Peg).
Thm* (s is a Hanoi(n disk) seq on a..z Thm* (
Thm* ((s(?) {to n} h {to n'}) is a Hanoi(n' disk) seq on a..z)
Generated subgoals:
None
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