Inverse Problems of Geophysics
Ин-т Математики им С.Л. Соболева СОРАН   Россия;
Schlumberger   Oslo   Norway;
Ин-т Математики им С.Л. Соболева СОРАН   Россия
и Wichita State University   USA
We consider the Cauchy problem for the Helmholtz equation with given bounded refractive index in an arbitrary planar domain with Cauchy data only on part of the boundary of the domain. We derive a Carleman-type formula for a solution to this problem.
From another side we obtain the inversion formula for smooth unknown refractive index using the Cauchy date set on the boundary. Based of this inversion formula we numerically reconstruct the refractive index on the unit disk.
Note. Abstracts are published in author's edition
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