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arxiv: math/0112132 · v1 · submitted 2001-12-12 · 🧮 math.SP

A Class of Matrix-Valued Schr\"odinger Operators with Prescribed Finite-Band Spectra

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keywords matrix-valuedodingeroperatorsschrclassfinite-bandprescribedspectra
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We construct a class of matrix-valued Schr\"odinger operators with prescribed finite-band spectra of maximum spectral multiplicity. The corresponding matrix potentials are shown to be stationary solutions of the KdV hierarchy. The methods employed in this paper rely on matrix-valued Herglotz functions, Weyl--Titchmarsh theory, pencils of matrices, and basic inverse spectral theory for matrix-valued Schr\"odinger operators.

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