Determination of a parameter p(t) in some quasi-linear parabolic differential equations

John R. Cannon, Yanping Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

94 Citations (Scopus)


The authors consider the following inverse problem of finding the evolution parameter p(t) and the solution u(x, t) such that ut= Sigmai,j=1n(aij(x, t)uxi+bj(x, t, u))xj+F(x, t, u, p) in QTu(x, 0)=u0(x) x in Omega Sigmai,j=1n(aij(x, t)uxi+bj(x, t, u))*vj(x)=g(x, t, u) on STand integralOmegaphi (x, t)u(x, t)dx=E(t) 0<or=t<or=T where QT= Omega *(0, T), T>0 and Omega is an open bounded region in Rnwith boundary delta Omega as smooth as needed throughout this paper; v(x)=(v1(x), v2(x),. . ., vn(x)) is the outwardly pointing normal direction on delta Omega ; u0, g, F, aij, bj, phi and E are given functions. The notion of a weak solution for the pair (u, p) is formulated. The existence, uniqueness and continuous dependence upon the data of the solution (u, p) are demonstrated for F(x, t, u)=G(x, t, u)+H(x, t)p(t) and F(x, t, u)=G(x, t, u)+u(x, t)p(t).
Original languageEnglish
Article number006
Pages (from-to)35-45
Number of pages11
JournalInverse Problems
Issue number1
Publication statusPublished - 1 Dec 1988
Externally publishedYes

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Signal Processing
  • Mathematical Physics
  • Computer Science Applications
  • Applied Mathematics


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