Abstract
The concept of the multiplicity of the continuum spectrum is introduced for a class of dissipative quasihermitian operators. A formula is given for calculating it in terms of the nonnegative component of the polar expansion of the difference of the limiting values of the characteristic matrix-function.
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Moskaleva, Y.P. Multiplicity Characteristic of the Continuum Spectrum of a Class of Dissipative Operators. Journal of Mathematical Sciences 107, 4464–4466 (2001). https://doi.org/10.1023/A:1012577122098
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DOI: https://doi.org/10.1023/A:1012577122098