K S Govinder
Articles written in Pramana – Journal of Physics
Volume 61 Issue 3 September 2003 pp 493-499
A charged spherically symmetric solution
K Moodley S D Maharaj K S Govinder
We find a solution of the Einstein-Maxwell system of field equations for a class of accelerating, expanding and shearing spherically symmetric metrics. This solution depends on a particular
Volume 76 Issue 1 January 2011 pp 23-36 Research Articles
An analysis of the nonlinear equation $u_t = f(x, u)u_{xx} + g(x, u)u^2_x + h(x, u)u_x + p(x, u)$
We use the method of preliminary group classiﬁcation to analyse a particular form of the nonlinear diffusion equation in which the inhomogeneity is quadratic in $u_x$. The method yields an optimal system of one-dimensional subalgebras. As a result we obtain those explicit forms of the unknown functions 𝑓, 𝑔, ℎ and 𝑝 for which the equation admits additional point symmetries.
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