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Article

MSC: 35J05, 35J58, 65N38
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Keywords:
Signorini problem; augmented Lagrangian; fixed point; Steklov-Poincaré operator; boundary integral equation
Summary:
An augmented Lagrangian method, based on boundary variational formulations and fixed point method, is designed and analyzed for the Signorini problem of the Laplacian. Using the equivalence between Signorini boundary conditions and a fixed-point problem, we develop a new iterative algorithm that formulates the Signorini problem as a sequence of corresponding variational equations with the Steklov-Poincaré operator. Both theoretical results and numerical experiments show that the method presented is efficient.
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