Foundations of Physics

, Volume 35, Issue 7, pp 1205–1244 | Cite as

On the Unification of Geometric and Random Structures through Torsion Fields: Brownian Motions, Viscous and Magneto-fluid-dynamics

  • Diego L. RapoportEmail author


We present the unification of Riemann–Cartan–Weyl (RCW) space-time geometries and random generalized Brownian motions. These are metric compatible connections (albeit the metric can be trivially euclidean) which have a propagating trace-torsion 1-form, whose metric conjugate describes the average motion interaction term. Thus, the universality of torsion fields is proved through the universality of Brownian motions. We extend this approach to give a random symplectic theory on phase-space. We present as a case study of this approach, the invariant Navier–Stokes equations for viscous fluids, and the kinematic dynamo equation of magnetohydrodynamics. We give analytical random representations for these equations. We discuss briefly the relation between them and the Reynolds approach to turbulence. We discuss the role of the Cartan classical development method and the random extension of it as the method to generate these generalized Brownian motions, as well as the key to construct finite-dimensional almost everywhere smooth approximations of the random representations of these equations, the random symplectic theory, and the random Poincaré–Cartan invariants associated to it. We discuss the role of autoparallels of the RCW connections as providing polygonal smooth almost everywhere realizations of the random representations.


Brownian motions Riemann–Cartan–Weyl connections: trace-torsion electromagnetism autoparallels Navier–Stokes equations kinematic dynamo turbulence Reynolds decomposition stochastic differential equations 


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© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Department of MathsFIUBA, University of Buenos Aires, DCyT-UNQArgentina

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