# Re: The seven step series

```Hi Marty,

I can if you really want it, but it is out of topic and could
introduced some confusion.  I suggest we could come back on this later
perhaps. But if you insist, I can do it. have you get my last post?
Note that I have also already explained how binary strings can
represent number in some older post. Honestly we will not need this,
so it is better not to accumulate too many "new" materials, especially
when I can fear some confusion. It is good to be familiar with the
object "binary strings" seen as an object by itself.```
```
Bruno

On 23 Jul 2009, at 14:02, m.a. wrote:

> Hi Bruno,
>                 I asked Brent Meeker a question which he referred
> back to you. Will you be covering it? (see para in bold below)
>
> ----- Original Message -----
> From: "Brent Meeker" <meeke...@dslextreme.com>
> Sent: Wednesday, July 22, 2009 11:49 PM
> Subject: Re: The seven step series
>
> >> *0000   0001    0010    0011     0100    0101    0110    0111
> >> 1000     1001     1010       1011         1100         1101
> >> 1110      1111*
> >> **
> >> *and this is the binary sequence of length 4.*
> >
> > Right, it's all the binary strings of length 4
> >
> >> **
> >> *How do these translate into ordinary numerals? 1,2,3,4...*
> >
> > Bruno's using them to represent sets and subsets.  So if we have a
> set {a b c}
> > we can represent the subset {a c} by 101 and {a b} by 110, etc.
> That's quite
> > different from using a binary string to represent a number in
> positional
> > notation.  I'll leave it to Bruno whether he wants to go into that.
>
>
>
>
>
>
>
> >
> > Brent
> >
> >
> >

http://iridia.ulb.ac.be/~marchal/

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