期刊
ANALYSIS & PDE
卷 6, 期 8, 页码 2003-2048出版社
MATHEMATICAL SCIENCE PUBL
DOI: 10.2140/apde.2013.6.2003
关键词
Calderon problem; partial data; inverse problem
资金
- NSF
- Academy of Finland
- ERC
- Direct For Mathematical & Physical Scien
- Division Of Mathematical Sciences [1265249] Funding Source: National Science Foundation
We consider Calderon's inverse problem with partial data in dimensions n >= 3. If the inaccessible part of the boundary satisfies a (conformal) flatness condition in one direction, we show that this problem reduces to the invertibility of a broken geodesic ray transform. In Euclidean space, sets satisfying the flatness condition include parts of cylindrical sets, conical sets, and surfaces of revolution. We prove local uniqueness in the Calderon problem with partial data in admissible geometries, and global uniqueness under an additional concavity assumption. This work unifies two earlier approaches to this problem - one by Kenig, Sjostrand, and Uhlmann, the other by Isakov - and extends both. The proofs are based on improved Carleman estimates with boundary terms, complex geometrical optics solutions involving reflected Gaussian beam quasimodes, and invertibility of (broken) geodesic ray transforms. This last topic raises questions of independent interest in integral geometry.
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