Monotonicity of input-output mappings in inverse coefficient and source problems for parabolic equations


HASANOV A., Demir A. , Erdem A.

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, cilt.335, ss.1434-1451, 2007 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 335 Konu: 2
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jmaa.2007.01.097
  • Dergi Adı: JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
  • Sayfa Sayısı: ss.1434-1451

Özet

This article presents a mathematical analysis of input-output mappings in inverse coefficient and source problems for the linear parabolic equation u(t) = (k(x)u(x))(x) + F(x, t), (x, t) is an element of ohm(T) := (0, 1) x (0, T]. The most experimentally feasible boundary measured data, the Neumann output (flux) data f (t) := -k(0)u(x)(0, t), is used at the boundary x = 0. For each inverse problems structure of the input-output mappings is analyzed based on maximum principle and corresponding adjoint problems. Derived integral identities between the solutions of forward problems and corresponding adjoint problems, permit one to prove the monotonicity and invertibility of the input-output mappings. Some numerical applications are presented. (c) 2007 Elsevier Inc. All rights reserved.