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Group-Invariant Solutions for the Generalised Fisher Type Equation
School of Computer Science and Applied Mathematics, University of the Witwatersrand, Johannesburg, South Africa
School of Computer Science and Applied Mathematics, University of the Witwatersrand, Johannesburg, South Africa
- 1 School of Computer Science and Applied Mathematics, University of the Witwatersrand, Johannesburg, South Africa
- 2 School of Computer Science and Applied Mathematics, University of the Witwatersrand, Johannesburg, South Africa
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Abstract
In this paper, we construct the group-invariant (exact) solutions for the generalised Fisher type equation using both classical Lie point and the nonclassical symmetry techniques. The generalised Fisher type equation arises in theory of population dynamics. The diffusion term and coefficient of the source term are given as the power law functions of the spatial variable. We introduce the modified Hopf-Cole transformation to simplify a nonlinear second Order Ordinary Equation (ODE) into a solvable linear third order ODE.
KeywordsSymmetry MethodsModified Hopf-Cole TransformationFisher Type EquationExact Solutions
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