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Colloquium: “An inverse problem in elasticity”

Marshall University Math Colloquium
March 3, 2005

Akhtar A. Khan
Michigan Technological University

In this talk I will discuss a simple inverse problem in elasticity. The talk will be focused on the issues such as: What is an inverse problem? What are the common approaches to solve an inverse problem? Why are inverse problems challenging? I will pose the inverse problem as an optimization problem and discuss several existing approaches. Numerical results will be given for the various approaches. Having established this background I will discuss some new results obtained by myself. Mainly I will show that the output least-squares approach for elliptic inverse problems, using a coefficient-dependent energy norm functional, results in a smooth, convex minimization problem. I will discuss several theoretical and numerical advantages of having a convex objective functional. The issue of dealing with the discontinuous coefficients will also be discussed.

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