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@Article{Sen20124115, author = "Abhijit Sen and Dilip P. Ahalpara and Anantanarayanan Thyagaraja and Govind S. Krishnaswami", title = "A {KdV}-like advection-dispersion equation with some remarkable properties", journal = "Communications in Nonlinear Science and Numerical Simulation", volume = "17", number = "11", pages = "4115--4124", year = "2012", ISSN = "1007-5704", DOI = "doi:10.1016/j.cnsns.2012.03.001", URL = "http://www.sciencedirect.com/science/article/pii/S100757041200113X", keywords = "genetic algorithms, genetic programming, Advection dispersion equation, Travelling waves, Recurrence", abstract = "We discuss a new non-linear PDE, u t + ( 2 u xx / u ) u x = ?\mu u xxx , invariant under scaling of dependent variable and referred to here as SIdV. It is one of the simplest such translation and space-time reflection-symmetric first order advection-dispersion equations. This PDE (with dispersion coefficient unity) was discovered in a genetic programming search for equations sharing the KdV solitary wave solution. It provides a bridge between non-linear advection, diffusion and dispersion. Special cases include the mKdV and linear dispersive equations. We identify two conservation laws, though initial investigations indicate that SIdV does not follow from a polynomial Lagrangian of the KdV sort. Nevertheless, it possesses solitary and periodic travelling waves. Moreover, numerical simulations reveal recurrence properties usually associated with integrable systems. KdV and SIdV are the simplest in an infinite dimensional family of equations sharing the KdV solitary wave. SIdV and its generalisations may serve as a testing ground for numerical and analytical techniques and be a rich source for further explorations.", }

Genetic Programming entries for Abhijit Sen Dilip P Ahalpara Anantanarayanan Thyagaraja Govind S Krishnaswami