Inverse Nodal Problems: Finding the Potential from Nodal Lines (Memoirs of the American Mathematical Society v. 119)
By: Joyce R. McLaughlin (author), Ole H. Hald (author)Paperback
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Can you hear the shape of a drum? In this book, the authors ask, 'Can you see the force on a drum?' Hald and McLaughlin prove that for almost all rectangles the potential in a Schrodinger equation is uniquely determined (up to an additive constant) by a subset of the nodal lines. They derive asymptotic expansions for a rich set of eigenvalues and eigenfunctions. Using only the nodal line positions, they establish an approximate formula for the potential and give error bounds. The theory is appropriate for a graduate topics course in analysis with emphasis on inverse problems. The formulas that solve the inverse problem are very simple and easy to state. Nodal Line Patterns-Chaldni Patterns - are shown to be a rich source of data for the inverse problem. The data in this book is used to establish a simple formula that is the solution of an inverse problem.
Introduction Separation of eigenvalues for the Laplacian Eigenvalues for the finite dimensional problem Eigenfunctions for the finite dimensional problem Eigenvalues for $- \Delta + q$ Eigenfunctions for $- \Delta + q$ The inverse nodal problem The case $f R q\neq 0$ Acknowledgment References Appendices.
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- ID: 9780821804865
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