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Re: Mark-Jason's excellent clarif. CORRECTED (was: Re: Mathematicians and Ranks
- To: zzdev@xxxxxxxxxx
- Subject: Re: Mark-Jason's excellent clarif. CORRECTED (was: Re: Mathematicians and Ranks
- From: Ted Nelson <ted@xxxxxxxxxx>
- Date: Mon, 02 Nov 1998 00:49:47 +0900
- Cc: ted@xxxxxxxxxxxxxx
- Reply-to: zzdev@xxxxxxxxxx
[Prev. error flagged with asterisk below]
Ha!
Mark-Jason has provided an excellent insight into
a likely misunderstanding. Since I did not realize
this was a likely misunderstanding, I have till now
done nothing to thwart it.
Sez he:
><<Light goes on>>
>
>I just realized that I keep imainging that zigzagspace is a lattice or
>an array, where each position on the lattice might or might not
>contain a cell. But that's totally, totally wrong. I have to stop
>thinking that; it keeps confusing me.
*Just so. A new cell [prev. said: "space"] can be created anywhere with only
the local effects (connex) you want.
ChrzT
At 10:45 AM 10/29/98 -0500, you wrote:
>
>> >Unless I misundestand youm all seven cells ABCD PQR are in the same
>> >rank, but ABCD are in one blurfl and PQR are in a separate blurfl.
>>
>> ABCD are in one rank and PQR are in another rank.
>> They are in the same dimension.
>
>Oh, that's fine then.
>
><<Light goes on>>
>
>I just realized that I keep imainging that zigzagspace is a lattice or
>an array, where each position on the lattice might or might not
>contain a cell. But that's totally, totally wrong. I have to stop
>thinking that; it keeps confusing me.
>
>
>> >Oh, it's no trouble. Mathematicians call it a `product space', and
>> >they are quite happy to take products of circles. If you take the
>> >product of two line segments, you get a plane segment. If you take
>> >the product of a segment and a circle, you get a cylinder. If you
>> >take the product of two circles, you get a torus.
>>
>> I don't think so ... a rank is a bunch of ordered elements,
>> but the ordering can be in a loop. That's all.
>
>Sure. Not every zigzag space is a product space. I only mentioned it
>to point out that mathematicians to understand that things can be
>circular and that things that are circular in one direction and flat
>in another direction do not bother them.
>
>> >If you have a ZZ object in three dimensions all of which are
>> >ringranks, there are a lot of mathematicians who will come along and
>> >say, ``Ah, yes, S1-cubed.'' (S1 is topological jargon for the
>> >circle.)
>>
>> This is possible with even just one cell. But is this the correct
>> terminology for sets of elements,
>> as well as continuous objects?
>
>Probably. I think that topologically they have too much in common for
>someone to bother inventing new terminology. But I don't really know.
>
>> >Hmm, I'm suddenly inspired to make a ZZ object that is shaped like a
>> >Klein bottle. It shouldn't take long.
>>
>> Looking forward... uh, inward...
>> better consult the Navel Observatory ...
>
>That project is turning into a ZZ tutorial on algebraic topology.
>
>I'll put it on my FTP site when it is ready.
>
>
____________________________________________________
Theodor Holm Nelson, Visiting Professor of Environmental Information
Keio University, Shonan Fujisawa Campus, Fujisawa, Japan
Home Fax from USA: 011-81-466-46-7368 (If in Japan, 0466-46-7368)
Professorial home page http://www.sfc.keio.ac.jp/~ted/
_____________________________________________________
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PERMANENT E-MAIL: ted@xxxxxxxxxx
_____________________________________________________
Quotation of the day, 98.11.01:
"Life and death are both hereditary." TN59