On an m-dimensional Riemannian manifold, the characteristic operator of this process is one half the Laplace-Beltrami operator. Lévy's condition describes the conditions necessary for a continuous process to be one. On long timescales it is well described by the Langevin equation and the workings of this Weiner process in fluids was the subject of 
On an m-dimensional Riemannian manifold, the characteristic operator of this process is one half the Laplace-Beltrami operator. Lévy's condition describes the conditions necessary for a continuous process to be one. On long timescales it is well described by the Langevin equation and the workings of this Weiner process in fluids was the subject of a 1905 paper by Albert Einstein. For 10 points, first discovered by looking at pollen grains under a microscope, name this phenomenon, the random movement of particles suspended in a fluid?
On an m-dimensional Riemannian manifold, the characteristic operator of this process is one half the Laplace-Beltrami operator.
{Brownian} motion