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comment From differentials to differential equations
@Guido, Actually your discrete problem looks like a kind of "one way diffusion". I wonder whether modelling it on a Cellular Automata framework would be possible?
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answered From differentials to differential equations
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comment Deriving group velocity
I have extended this answer to cover some background to the calculation.
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revised Deriving group velocity
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comment Does the Banach-Tarski paradox contradict our understanding of nature?
Ron, Does not the Solovay model require assuming the existence of an Inaccessible Cardinal? If (mathematical) physics is to be described better with Solovay, then do you have an interpretation for this Inaccessible object?
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answered Deriving group velocity
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