A Least Squares Functional for Solving Inverse Sturm-Liouville Problems

Details A Least Squares Functional for Solving Inverse Sturm-Liouville Problems A Least Squares Functional for Solving Inverse Sturm-Liouville Problems

2005-02-18

arxiv.org/abs/math/0502407v2

Inverse Problems 21 (2005) 2009-2017

Mathematics

Numerical Analysis

8 pages, 5 figures, corrected typos, minor clarifications

Scientific paper

10.1088/0266-5611/21/6/013

We present a variational algorithm for solving the classical inverse Sturm-Liouville problem in one dimension when two spectra are given. All critical points of the least squares functional are at global minima, which which suggests minimization by a (conjugate) gradient descent algorithm. Numerical examples show that the resulting algorithm works quite reliable without tuning for particular cases, even in the presence of noise. With the right choice of parameters the minimization procedure converges very quickly.

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