So I guess the goal of this list is to work on creating a CA that mirrors the way the universe works? How do you go about this work? Do you write test programs...
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Joel Dobrzelewski
dobrzele@...
Sep 3, 2001 11:40 am
Hi Travis - thanks for your posts! In addition to yours, I've noticed a few (relatively) recent subscriptions lately, so I guess this is a good time to say, ...
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dan@...
Sep 3, 2001 4:09 pm
well stated, Joel. I too extend my welcome to all who post here. While we often disagree on various details and specific issues, I believe we are all bound by...
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Plamen Petrov
ppetrov@...
Sep 6, 2001 5:48 am
Dear all: recently I got an interesting letter from Manuel Moralez, an AI researcher from Mexico. I think his letter and my reply to him might be of some...
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Plamen Petrov
ppetrov@...
Sep 6, 2001 6:06 am
... The reason for this seems to be my decision to put our [digitalphysics] discussion group into the "Artificial Life" category! :) (After the "purchase"; of...
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dan@...
Sep 6, 2001 6:06 am
... The subject of relativity and computation is very interesting, but I don't see how one's relativistic timeframe could affect whether things are seen as...
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Plamen Petrov
ppetrov@...
Sep 6, 2001 6:47 am
... Dear Dan: thank you for your posting! The link cited above is in the our "Links" page for a long time: http://www.digitalphysics.org/Links/ Especially, I...
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Plamen Petrov
ppetrov@...
Sep 6, 2001 7:06 am
My apologies to all: I have omitted a few words in my last posting, so please skip it without reading, read this letter instead. Plamen ... Dear Dan: thank you...
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Tim Tyler
tt2333@...
Sep 6, 2001 11:57 am
... If http://www.hedweb.com/everett/everett.htm#detect is anything to go by, the experiments that would show the problem with the Copenhagen interpretation...
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Tim Tyler
tt2333@...
Sep 6, 2001 12:25 pm
Some time ago David Bell reported (essentially) that the Aspect experiment (and many other tests of Bell's inequality) are flawed: ...
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Tim Tyler
tt2333@...
Sep 6, 2001 12:33 pm
If we model the universe as a CA it seems the automaton in question may be expected to have at least three dimensions - if it is to have any predictive power. ...
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Tim Tyler
tt2333@...
Sep 6, 2001 12:38 pm
It is sometimes thought that one of the tests of discrete finite physical theories would be experiments revealing the orientation of the underlying lattice. ...
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Tim Tyler
tt2333@...
Sep 6, 2001 12:44 pm
... I would recommend checking Alan Hensel's applet at: http://hensel.lifepatterns.net/ ...before putting very much energy into a Java implementation of...
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Eugene Leitl
eugene.leitl@...
Sep 6, 2001 12:44 pm
... Assuming finite nature is true, it doesn't have to be a lattice, nor does it have to be a local (i.e. low-dimensional one). The underlying basis of reality...
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Tim Tyler
tt2333@...
Sep 6, 2001 12:55 pm
... Ordinary computers are not UTMs - since UTMs have access to unlimited storage - while computers do not. The question of whether a finite CA underlying the...
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Tim Tyler
tt2333@...
Sep 6, 2001 1:07 pm
... [ the classic photon-entanglement scenario] ... Would have to agree there. Looking at Aspect-like experiments running backwards might be a fun thought...
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Tim Tyler
tt2333@...
Sep 6, 2001 1:28 pm
... FWIW, my opinion is that whether an automata is minimal or not should play no part in whether we consider it as a candidate universal rule. I remember I...
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Tim Tyler
tt2333@...
Sep 6, 2001 1:45 pm
... Ooops: s/Bell/Elm/...
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Tim Tyler
tt2333@...
Sep 6, 2001 1:45 pm
... I'm not sure that that is an advantage for minimality. Consider a minimal automata, and a non-minimal automata. Both have "some particular rule". Both...
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Joel Dobrzelewski
dobrzele@...
Sep 6, 2001 1:58 pm
Wow - I can hardly keep up! I'm really glad to see such a flourish of activity. :) ... Yes, this is a good question. I think my best answer, so far, is...
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Joel Dobrzelewski
dobrzele@...
Sep 6, 2001 2:16 pm
... Again - good questions, Tim. With a minimal automaton, the initial configuration is the smallest one that starts the infinite evolution of all states....
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Tim Tyler
tt2333@...
Sep 6, 2001 2:19 pm
... I /think/ you need locality. Of course locality does not prohibit very large neighbourhoods - but I think if your neighbourhood actually becomes infinite...
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Tim Tyler
tt2333@...
Sep 6, 2001 2:35 pm
... I don't really think that is right: Your minimal automata work from an initial configuration of one set cell - and produce "lots of interesting stuff" from...
237
Tim Tyler
tt2333@...
Sep 6, 2001 2:37 pm
... I don't really think that is right: Your minimal automata work from an initial configuration of one set cell - and produce "lots of interesting stuff" from...
238
Tim Tyler
tt2333@...
Sep 6, 2001 2:37 pm
... I don't really think that is right: Your minimal automata work from an initial configuration of one set cell - and produce "lots of interesting stuff" from...
239
Tim Tyler
tt2333@...
Sep 6, 2001 2:39 pm
... I don't really think that is right: Your minimal automata work from an initial configuration of one set cell - and produce "lots of interesting stuff" from...
240
Tim Tyler
tt2333@...
Sep 6, 2001 2:41 pm
... I don't really think that is right: Your minimal automata work from an initial configuration of one set cell - and produce "lots of interesting stuff" from...
241
Joel Dobrzelewski
dobrzele@...
Sep 6, 2001 2:56 pm
... Yes, you're right. I wasn't very clear. I think I was thinking more about universal computation. The universe must be a universal computer as well. Are...
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Tim Tyler
tt2333@...
Sep 6, 2001 2:59 pm
... Well any automaton has a large number of /possible/ ICs... Are you /really/ conjecturing that only minimal automata can produce interesting and complex...
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Tim Tyler
tt2333@...
Sep 6, 2001 3:39 pm
... You are asking after a CA that: a) performs universal computation; b) explodes from a single set cell to a complex structure containing interesting things...
