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Theory wise.

- I
- Thread starter Zero-shift
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Theory wise.

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In modern quantum theory the classical physics occurs as an emergent phenomenon derivable from quantum theory by appropriate coarse-graining to effectively describe the relevant macroscopic degrees of freedom.

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bhobba

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And later Dirac's transformation theory was bought into rigorous mathematical form thanks to some of the greatest mathematicians of the later part of the 20th century - Gelfland, Grothendieck and Schwartz.brought to a rigorous mathematical form in terms of Hilbert-space theory by von Neumann.

Often mathematicians preempt the mathematics physicists and other applied mathematicians need, but here it was reversed and led to some very beautiful, deep and highly applicable math.

Thanks

Bill

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