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An inverse problem of identifying the radiative coefficient in a degenerate parabolic equation

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Abstract

The authors investigate an inverse problem of determining the radiative coefficient in a degenerate parabolic equation from the final overspecified data. Being different from other inverse coefficient problems in which the principle coefficients are assumed to be strictly positive definite, the mathematical model discussed in this paper belongs to the second order parabolic equations with non-negative characteristic form, namely, there exists a degeneracy on the lateral boundaries of the domain. Based on the optimal control framework, the problem is transformed into an optimization problem and the existence of the minimizer is established. After the necessary conditions which must be satisfied by the minimizer are deduced, the uniqueness and stability of the minimizer are proved. By minor modification of the cost functional and some a priori regularity conditions imposed on the forward operator, the convergence of the minimizer for the noisy input data is obtained in this paper. The results can be extended to more general degenerate parabolic equations.

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Authors and Affiliations

  1. Department of Mathematics, Lanzhou Jiaotong University, Lanzhou, 730070, China

    Zuicha Deng

  2. School of Mathematics and Statistics, Lanzhou University, Lanzhou, 730000, China

    Liu Yang

Authors
  1. Zuicha Deng
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  2. Liu Yang
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Correspondence to Zuicha Deng.

Additional information

This work was supported by the National Natural Science Foundation of China (Nos. 11061018, 11261029), the Youth Foundation of Lanzhou Jiaotong University (No. 2011028), the Long Yuan Young Creative Talents Support Program (No. 252003) and the Joint Funds of the Gansu Provincial Natural Science Foundation of China (No. 1212RJZA043).

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Deng, Z., Yang, L. An inverse problem of identifying the radiative coefficient in a degenerate parabolic equation. Chin. Ann. Math. Ser. B 35, 355–382 (2014). https://doi.org/10.1007/s11401-014-0836-x

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  • DOI: https://doi.org/10.1007/s11401-014-0836-x

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