m.a. wrote:
> Hi Brent,
> I really appreciate the help and I hate to impose on
> your patience but...(see below)
>
> ----- Original Message -----
> From: "Brent Meeker" <meeke...@dslextreme.com
> <mailto:meeke...@dslextreme.com>>
> To: <everything-list@googlegroups.com
> <mailto:everything-list@googlegroups.com>>
> Sent: Tuesday, July 21, 2009 5:24 PM
> Subject: Re: The seven step series
>
> >
> > Take all strings of length 2
> > 00 01 10 11
> > Make two copies of each
> > 00 00 01 01 10 10 11 11
>
> > Add a 0 to the first and a 1 to the second
> > 000 001 010 011 100 101 110 111
> > and you have all strings of length 3.
> *I can see where adding 0 to the first and 1 to the second gives 000 and
> 001 and I think I see how you get 010 but the rest of the permutations
> don't seem obvious to me. P-l-e-a-s-e explain, Best,*
> **
>
>
>
> * m. (mathematically hopeless) a.*

##
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They aren't permutations. They're just sticking a 0 or 1 on the end. One copy
of 01 becomes 010 and the other become 011.
Brent
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