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A symmetry group method is used to obtain exact solutions for a semilinear radial heat equation in n > 1 dimensions with a general power nonlinearity. The method involves an ansatz technique to solve an equivalent first-order PDE system of similarity variables given by group foliations of this heat equation, using its admitted group of scaling symmetries. This technique yields explicit similarity solutions as well as other explicit solutions of a more general (non-similarity) form havingdoi:10.1016/j.jmaa.2011.01.073 fatcat:vtbp2tserzafnglkgf5lf4ymwq