Here's my third try. I'll continue working on the (power x) problem.   m.a.
  ----- Original Message ----- 
  From: Bruno Marchal 
  To: everything-list@googlegroups.com 
  Sent: Wednesday, July 08, 2009 1:31 PM
  Subject: Re: The seven step series




  On 08 Jul 2009, at 15:43, m.a. wrote:


    Second try:
          (power {1, 2, 3}) = ? {{ }, {1}, {2}, {3}, {1,2}, {2,3}, {1,2,3}}

             Third try: 
                                           =   {{ }, {1}, {2}, {3}, {1,2}, 
{2,3}, {1,2,3}, {{ },1,2,3}}


  This is far better!  Not yet correct though.


  I gave you the hint that there are 8 elements. Let us count: 


  The empty set { }  ..................................1
  Three singletons {1}, {2}, {3}................3
  Two doubletons {1,2 }, {2,3 }................2
  The biggest subset  {1,2,3}..................1


  1 + 3 + 2 + 1 = 7


  A subset is missing! Can you see which one?




      

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