2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197744We generalize the method of obtaining the fundamental linear partial differential equations such as the diffusion and Schrodinger equation, Dirac and telegrapher's equation from a simple stochastic consideration to arrive at certain nonlinear form of these equations. The group classification through one parameter group of transformation for two of these equations is also carried out.18 pages, Latex file, some equations corrected and group analysis in one more case addedMathematical PhysicsHigh Energy Physics - Theorytext