# Re: The seven step series

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
>
> >
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