Hm.
What about properties that show up (a synonym for 'emerge') in one
system but also show up in other systems. Many things reposition when
in combination with other things/dynamics. Does this mean that all
those repositionings are emergent? Or just a physical law that applies
across a range of systems?
Tory
On Jul 9, 2009, at 10:11 AM, glen e. p. ropella wrote:
Thus spake russell standish circa 07/08/2009 05:33 PM:
On Wed, Jul 08, 2009 at 10:16:55AM -0700, glen e. p. ropella wrote:
Well, since my post consisted of questions, I could hardly be
wrong. ;-)
The question was: Is there any identifiable property of a system
that is
NOT an emergent property, regardless of how one defines "system"?
If
anyone knows of one, please name it!
Absolutely! The positions of the particles in a Newtonian n-body
system
are not emergent. Of course there are other properties of these
systems that are emergent, but position & momenta of the particles
are
not amongst them, being part of the basic vocabulary of the model.
Excellent! Thanks Russell.
However, I claim that the positions and momenta (note the plural) of
the
individual components are not properties of the _system_. Those are
properties of the individual components. A systemic property
related to
those component properties might be a centroid or cumulative
(averaged,
summed, etc.) momentum for the system as a whole.
Of course, the position or momentum of an individual particle is a
systemic property of the system that constitutes that single
particle (a
system of quarks, say).
The question then becomes, is a centroid or cumulative measure of a
system of particles "emergent"? Or are the position and momentum of a
system of quarks "emergent"?
--
glen e. p. ropella, 971-222-9095, http://agent-based-modeling.com
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