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On a theorem of Gearhart

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References

  1. Gearhart, L.: Spectral theory for contraction semigroups on Hilbert space, Trans. Amer. Math. Soc.236 (1978), 385–394.

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  2. Herbst, I. W.: The spectrum of Hilbert space semigroups, J. Operator Theory (to appear).

  3. Herbst, I. W.: Contraction semigroups and the spectrum of I ⊗ A1+A2 ⊗ I., J. Operator Theory7 (1981) 61–78.

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  4. Herbst, I. W., and B. Simon: Dilation analyticity in constant electric field, II, Comm. Math. Phys.80 (1981), 181–216.

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Authors and Affiliations

  1. Department of Mathematics, University of Virginia, 22903, Charlottesville, Virginia

    James S. Howland

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  1. James S. Howland
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Supported by NSF grant MCS 79-02490

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Howland, J.S. On a theorem of Gearhart. Integr equ oper theory 7, 138–142 (1984). https://doi.org/10.1007/BF01204917

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