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Title: On the non-linear integral equation approaches for the boundary reconstruction in double-connected planar domains
Authors: Chapko, R. S.
Yaman, Olha Ivanyshyn
Kanafotskyi, T. S.
Keywords: Double connected domains
Boundary reconstruction
Green's function
Single layer potential
Boundary integral equations
Trigonometric quadrature method
Tikhonov regularization
Publisher: Ivan Franko National University of Lviv,
Abstract: We consider the reconstruction of an interior curve from the given Cauchy data of a harmonic function on the exterior boundary of the planar domain. With the help of Green's function and potential theory the non-linear boundary reconstruction problem is reduced to the system of non-linear boundary integral equations. The three iterative algorithms are developed for its numerical solution. We find the Frechet derivatives for the corresponding operators and show unique solviability of the linearized systems. Full discretization of the systems is realized by a trigonometric quadrature method. Due to the inherited ill-possedness in the obtained system of linear equations we apply the Tikhonov regularization. The numerical results show that the proposed methods give a good accuracy of reconstructions with an economical computational cost.
ISSN: 0868-6912
Appears in Collections:Mathematics / Matematik
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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