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The time fractional diffusion-wave equation

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Abstract

The time fractional diffusion-wave equation is obtained from the classical diffusion or wave equation by replacing the first- or second-order time derivative by a fractional derivative of order 2β with 0<β≤1/2 or 1/2<β≤1, respectively. Using the method of the Laplace transform, it is shown that the fundamental solutions of the basic Cauchy and signalling problems can be expressed in terms of an auxiliary function M (z; β), where z is the similarity variable. Such function, which reduces to the well-known Gaussian function for β=1/2 (ordinary diffusion), is proved to be an entire function of Wright type.

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Authors
  1. F. Mainardi
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Additional information

Department of Physics, University of Bologna, Italy. Published in Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 38, Nos. 1–2, pp. 20–36, January–February, 1995.

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Mainardi, F. The time fractional diffusion-wave equation. Radiophys Quantum Electron 38, 13–24 (1995). https://doi.org/10.1007/BF01051854

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  • DOI: https://doi.org/10.1007/BF01051854

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