Journal
COMPTES RENDUS MATHEMATIQUE
Volume 341, Issue 5, Pages 333-337Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crma.2005.07.005
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Sensitivity of the heat equation to jumps of conductivity. We investigate the differentiability of the solution of the heat equation with respect to the conductivity when this is piecewise continuous. We prove the existence of Lagrangian and punctual differentials and give their respective expressions. Finally, an application to the identification of a discontinuity is presented. Here, we propose an alternative method to the classical fast derivative method, which greatly simplifies the computations. To cite this article: O. Pantz, C. R. Acad. Sci. Paris, Ser. I 341 (2005). (C) 2005 Academie des sciences. Publie par Elsevier SAS. Tous droits reserves.
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