# Re: The seven step series

From: m.a. <marty684.domain.name.hidden>
Date: Tue, 21 Jul 2009 15:36:19 -0400

Hi Bruno,
I'm not clear on the sentence in bold below, especially the word "correspondingly". The example of Mister X only confuses me more. Could you please give some simple examples? Thanks,
marty a.

----- Original Message -----
From: Bruno Marchal
To: everything-list.domain.name.hidden
Sent: Monday, July 20, 2009 3:17 PM
Subject: Re: The seven step series

On 20 Jul 2009, at 15:34, m.a. wrote:

And then we have seen that such cardinal was given by 2^n.
You can see this directly by seeing that adding an element in a set, double the number of subset, due to the dichotomic choice in creating a subset "placing or not placing" the new element in the subset.

Likewise with the strings. If you have already all strings of length n, you get all the strings of length n+1, by doubling them and adding zero or one correspondingly.

This is also illustrated by the iterated self-duplication W, M. Mister X is cut and paste in two rooms containing each a box, in which there is a paper with zero on it, in room W, and 01 on it in room M. After the experience, the 'Mister X' coming out from room W wrote 00 in his diary, and the 'Mister X' coming out from room M wrote 1 in his diary. And then they redo each, the experiment. The Mister-X with-0-in-his-diary redoes it, and gives a Mister-X with-0-in-his-diary coming out from room W, and adding 0 in its diary and a Mister-X with-0-in-his-diary coming out from room M, adding 1 in its diary: they have the stories

Bruno

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

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Received on Tue Jul 21 2009 - 15:36:19 PDT

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