Joint spectrum of commuting normal operators and its position. Estimates for roots of second order polynomials. Definition of well-posedness of boundary-value problems

  • Alexander Ya. Shklyar
Part of the Operator Theory Advances and Applications book series (OT, volume 92)


For the sake of simplicity, we begin with an important particular case where A and B are arbitrary commuting self-adjoint operators (c.s.o.) in a separable Hilbert space H.


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Copyright information

© Birkhäuser Verlag 1997

Authors and Affiliations

  • Alexander Ya. Shklyar
    • 1
  1. 1.Institute of MathematicsUkrainian Academy of SciencesKievUkraine

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