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An abstract framework for elliptic inverse problems. II: An augmented Lagrangian approach. (English) Zbl 1197.74048

Summary: The coefficient in a linear elliptic partial differential equation can be estimated from interior measurements of the solution. Posing the estimation problem as a constrained optimization problem with the PDE as the constraint allows the use of the augmented Lagrangian method, which is guaranteed to converge. Moreover, the convergence analysis encompasses discretization by finite element methods, so the proposed algorithm can be implemented and will produce a solution to the constrained minimization problem. All of these properties hold in an abstract framework that encompasses several interesting problems: the standard (scalar) elliptic BVP in divergence form, the system of isotropic elasticity, and others. Moreover, the analysis allows for the use of total variation regularization, so rapidly-varying or even discontinuous coefficients can be estimated.
For part I, cf. Math. Mech. Solids 12, No. 3, 259–276 (2007; Zbl 1153.74021).

MSC:

74G75 Inverse problems in equilibrium solid mechanics
74B05 Classical linear elasticity
74S05 Finite element methods applied to problems in solid mechanics
35R30 Inverse problems for PDEs

Citations:

Zbl 1153.74021
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References:

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