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Cited by:

  1. F. Atkinson, H. Langer, R. Mennicken, A. A. Shkalikov, The essential spectrum of some matrix operators, Math. Nachr. 167 (1994), 5-20.
  2. R. Mennicken, H. Schmid, A. A. Shkalikov, On the eigenvalue accumulation of Sturm-Liouville problems depending nonlinearly on the spectral parameter, Math. Nachr. 189 (1998), 157-170.
  3. A. Hardt, R. Mennicken, S. Naboko, Systems of singular differential operators of mixed order and applications to 1-dimensional MHD problems, Math. Nachr. 205 (1999), 19-68.
  4. M. Faierman, R. Mennicken, M. Moller, The essential spectrum of a system of singular ordinary differential operators of mixed order. Part I: The general problem and an almost regular case, Math. Nachr. 208 (1999), 101-115.
  5. M. Faierman, R. Mennicken, M. Moller, The essential spectrum of a system of singular ordinary differential operators of mixed order. II. The generalization of Kako’s problem, Math. Nachr. 209 (2000), 55-81.
  6. P. Kurasov, S. Naboko, On the essential spectrum of a class of singular matrix differential operators. I: Quasiregularity conditions and essential self-adjointness, Mathematical Physics, Analysis and Geometry 5 (2002), 243-286.
  7. M. Kraus, M. Langer, C. Tretter, Variational principles and eigenvalue estimates for unbounded block operator matrices and applications, J. Comp. Appl. Math. 171 (2004), 311-334.
  8. P. Kurasov, I. Lelyavin, S. Naboko, On the essential spectrum of a class of singular matrix differential operators. II. Weyl’s limit circles for the HainLust operator whenever quasi-regularity conditions are not satisfied, Proc. Royal Soc. Edinburgh: A, 138 (2008), 109-138.
  9. C. Tretter, Spectral Theory of Block Operator Matrices and Applications, Imperial College Press, London, 2008.
  10. L. Boulton, M. Strauss, Eigenvalue enclosures and convergence for the linearized MHD operator, BIT Numerical Mathematics 52 (2012), 801-825.
  11. O. Ibrogimov, H. Langer, M. Langer, C. Tretter, Essential spectrum of systems of singular differential equations, Acta Sci. Math. (Szeged) 79 (2013), 423–465.
  12. O. Ibrogimov, Essential spectrum of non-self-adjoint singular matrix differential operators, J. Math. Anal. Appl. 451 (2017), 473–496.