Thm* n:
, a:
, z:{a...}, m:{a...z-1}, f,g:({1...n}
Peg).
Thm* f(n)g(n)
Thm*![]()
Thm* (s1:({a...m}
{1...n-1}
Peg), s2:({m+1...z}
{1...n-1}
Peg).
Thm* (s1 is a Hanoi(n-1 disk) seq on a..m
Thm* (& s1(a) = f{1...n-1}
Peg
Thm* (& s2 is a Hanoi(n-1 disk) seq on m+1..z
Thm* (& s2(z) = g{1...n-1}
Peg
Thm* (& s1(m) = s2(m+1)
Thm* (& (i:{1...n-1}. s1(m,i)
f(n) & s2(m+1,i)
g(n))
Thm* (![]()
Thm* ((HanoiHelper(n; s1; f; s2; g)/r1,r2.
Thm* (((r1 @(m) r2) is a Hanoi(n disk) seq on a..z & r1(a) = f & r2(z) = g))
is based on that of
Thm* n:
, a:
, z:{a...}, m:{a...z-1}, f,g:({1...n}
Peg).
Thm* f(n)g(n)
Thm*![]()
Thm* (s1:({a...m}
{1...n-1}
Peg), s2:({m+1...z}
{1...n-1}
Peg).
Thm* (s1 is a Hanoi(n-1 disk) seq on a..m
Thm* (& s1(a) = f{1...n-1}
Peg
Thm* (& s2 is a Hanoi(n-1 disk) seq on m+1..z
Thm* (& s2(z) = g{1...n-1}
Peg
Thm* (& s1(m) = s2(m+1)
Thm* (& (i:{1...n-1}. s1(m,i)
f(n) & s2(m+1,i)
g(n)))
Thm*![]()
Thm* (r1:({a...m}
{1...n}
Peg), r2:({m+1...z}
{1...n}
Peg).
Thm* ((r1 @(m) r2) is a Hanoi(n disk) seq on a..z & r1(a) = f & r2(z) = g)
from which the program
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