Navier-Stokes equations: Unpredictability even without butterflies?


Mathematically, the motion of a fluid is described by the so-called Navier-Stokes equations. In the spirit of Newtonian mechanics, these equations should determine the future motion of the fluid out of its initial state. However, despite the significant effort made for more than a century, this determinism has not yet been mathematically proved nor disproved. This paper offers a general perspective on the Navier-Stokes equations, the fourth millennium problem.


Navier-Stokes equations; fluid mechanics; meteorology; Newtonian determinism; millennium problems

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