In this paper we improve an earlier result by Bukhgeim and Uhlmann [1] showing that in dimension $n\ge 3$, the knowledge of the Cauchy data for the Schrödinger equation measured on possibly very small subsets of the boundary determines uniquely the potential. We follow the general strategy of [1] but use a richer set of solutions to the Dirichlet problem. This implies a similar result for the problem of Electrical Impedance Tomography which consists in determining the conductivity of a body by making voltage and current measurements at the boundary.
Carlos E. Kenig  1 ; Johannes Sjöstrand  2 ; Gunther Uhlmann  3
@article{10_4007_annals_2007_165_567,
author = {Carlos E. Kenig and Johannes Sj\"ostrand and Gunther Uhlmann},
title = {The {Calder\'on} problem with partial data},
journal = {Annals of mathematics},
pages = {567--591},
year = {2007},
volume = {165},
number = {2},
doi = {10.4007/annals.2007.165.567},
mrnumber = {2299741},
zbl = {1127.35079},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2007.165.567/}
}
TY - JOUR AU - Carlos E. Kenig AU - Johannes Sjöstrand AU - Gunther Uhlmann TI - The Calderón problem with partial data JO - Annals of mathematics PY - 2007 SP - 567 EP - 591 VL - 165 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4007/annals.2007.165.567/ DO - 10.4007/annals.2007.165.567 LA - en ID - 10_4007_annals_2007_165_567 ER -
%0 Journal Article %A Carlos E. Kenig %A Johannes Sjöstrand %A Gunther Uhlmann %T The Calderón problem with partial data %J Annals of mathematics %D 2007 %P 567-591 %V 165 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4007/annals.2007.165.567/ %R 10.4007/annals.2007.165.567 %G en %F 10_4007_annals_2007_165_567
Carlos E. Kenig; Johannes Sjöstrand; Gunther Uhlmann. The Calderón problem with partial data. Annals of mathematics, Tome 165 (2007) no. 2, pp. 567-591. doi: 10.4007/annals.2007.165.567
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