Abstract.
The skew-hermitian part of the Cauchy operator, defined with respect to arclength measure on the boundary, is known as the Kerzman-Stein operator. For an ellipse, the eigenvalues of this operator are shown to have multiplicity two. For an ellipse with small eccentricity, we compute the leading coefficient in the asymptotic expansion of the eigenvalues.
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Bolt, M. Spectrum of the Kerzman-Stein Operator for the Ellipse. Integr. equ. oper. theory 57, 167–184 (2007). https://doi.org/10.1007/s00020-006-1453-1
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DOI: https://doi.org/10.1007/s00020-006-1453-1