 

 Peg
Peg

 Peg
Peg
 g(k)
 g(k)
 f(i) = otherPeg(f(k); g(k))
  f(i) = otherPeg(f(k); g(k))| By: | THEN BackThru: Thm*  x,y,z:Peg. x  y   x  z   y  z   x = otherPeg(y; z) | 
| 1 |  i:{1...n}. f(i) = g(i)   i  k 9.  i:{1...k-1}. f(i)  f(k) & g(i)  g(k)  f(i)  f(k)  | 1 step | 
| 2 |  i:{1...n}. f(i) = g(i)   i  k 9.  i:{1...k-1}. f(i)  f(k) & g(i)  g(k)  f(i)  g(k)  | 3 steps | 
About:
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