Determining the temperature from incomplete boundary data

B. Tomas Johansson

Research output: Contribution to journalArticlepeer-review


An iterative procedure for determining temperature fields from Cauchy data given on a part of the boundary is presented. At each iteration step, a series of mixed well-posed boundary value problems are solved for the heat operator and its adjoint. A convergence proof of this method in a weighted L2-space is included, as well as a stopping criteria for the case of noisy data. Moreover, a solvability result in a weighted Sobolev space for a parabolic initial boundary value problem of second order with mixed boundary conditions is presented. Regularity of the solution is proved. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Original languageEnglish
Pages (from-to)1765-1779
Number of pages15
JournalMathematische Nachrichten
Issue number16
Early online date8 Nov 2007
Publication statusPublished - Dec 2007


  • Cauchy problem
  • heat equation
  • ill-posed
  • iterative regularization
  • weighted Sobolev space


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