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   RE: [xml-dev] Complex Systems [was: Ontologies vs Schemas vs Transforma

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Sensititivity to initial conditions.  Anywhere there is a feedback 
control and a cascading broadcast, the system can become unpredictable 
in just a few hops.  Look at Markov predictability.


From: Ian Graham [mailto:igraham@ic-unix.ic.utoronto.ca]

My understanding is that complex systems have underlying deterministic
dynamics, just like a chaotic system, but that only certain aspects of a
complex system can be predicted in a reliable way (also just like chaotic
systems). Also, there are parameters that, when changed only slightly, may
make a complex system's properties change dramatically, so that
predictability is difficult to impossible.

For example, some have argued that the power grid is a complex system -
but small changes to it (as recently observed) led to highly unpredictable


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