A note on analyticity and Floquet isospectrality

Carlson, Robert

doi:10.1090/S0002-9939-05-08166-9

A note on analyticity and Floquet isospectrality
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Proc. Amer. Math. Soc. 134 (2006), 1447-1449 Request permission

Abstract:

A simple argument shows that certain complex Hill’s operators have the same Floquet multipliers as the zero potential case. Previous results are extended to include matrix coefficients and some meromorphic potentials.

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