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Quasi solution of a backward space fractional diffusion equation

  • Amir Hossein Salehi Shayegan and Ali Zakeri EMAIL logo
Published/Copyright: June 13, 2019

Abstract

In this paper, based on a quasi solution approach, i.e., a methodology involving minimization of a least squares cost functional, we study a backward space fractional diffusion equation. To this end, we give existence and uniqueness theorems of a quasi solution in an appropriate class of admissible initial data. In addition, in order to approximate the quasi solution, the finite element method is used. Since the obtained system of linear equations is ill-posed, we apply TSVD regularization. Finally, three numerical examples are given. Numerical results reveal the efficiency and applicability of the proposed method.

MSC 2010: 65N21; 35R11

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Received: 2018-05-08
Revised: 2018-12-16
Accepted: 2019-04-11
Published Online: 2019-06-13
Published in Print: 2019-12-01

© 2019 Walter de Gruyter GmbH, Berlin/Boston

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