# Re: The seven step series

```Dear Bruno,
when I looked at the set-analysis it immediately popped up that {1,3} was
missing, - YET - this *fantastic<G>* discovery of mine did not bring me
closer to the idea "what are numbers".
It seems I can win the battle and still lose the war.
John```
```
On Wed, Jul 8, 2009 at 9:05 PM, m.a. <marty...@bellsouth.net> wrote:

>  *Here's my third try. I'll continue working on the (power x) problem.
> m.a.*
>
>  ----- Original Message -----
> *From:* Bruno Marchal <marc...@ulb.ac.be>
>  *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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