References

  1. Amanov D., Ashyralyev A. Well-posedness of boundary value problems for partial differential equations of even order. Electron. J. Diff. Equ. 2014, 108, 1-18.
  2. Amanov D.J., Yuldasheva A.V. Solvability and spectral properties of boundary value problems for equations of even order. Malays. J. Math. Sci. 2009, 3 (2), 227-248.
  3. Baranetskij Ya.O., Ivasiuk I.Ya., Kalenyuk P.I., Solomko A.V. The nonlocal boundary problem with perturbations of antiperiodicity conditions for the elliptic equation with constant coefficients. Carpathian Math. Publ. 2018, 10 (2), 215-234. doi: 10.15330/cmp.10.2.215-234
  4. Baranetskij Ya.O., Kalenyuk P.I., Kopach M.I. The nonlocal boundary problem with multipoint perturbations for the differential equations with constant coefficients of even order. Mat. Metodi Fiz.-Mekh. Polya 2018, 61 (1), 16-39. (in Ukrainian)
  5. Baranetskij Ya.O., Kalenyuk P.I., Kolyasa L.I., Kopach M.I. The nonlocal problem for the differential-operator equation of the even order with the involution. Carpathian Math. Publ. 2017, 9 (2), 109-119. doi: 10.15330/cmp.9.2.109-119
  6. Baranetskij Ya.O., Demkiv I.I., Ivasiuk I.Ya., Kopach M.I. The nonlocal problem for the differential equations the order 2n with an unbounded operator coefficients with the involution. Carpathian Math. Publ. 2018, 10 (1), 14-30. doi: 10.15330/cmp.10.1.14-30
  7. Demkiv I.I., Ivasiuk I.Ya., Kopach M.I. Interpolation integral continued fraction with twofold node. MMC 2019, 6 (1), 1-13. doi: 10.23939/mmc2019.01.001
  8. Irgashev B.Yu. Boundary problem for equations of high-even order. Vestnik VGU. Seriya 1. Mathematica. Physica. 2016, 334 (3), 6-18. (in Russian) doi: 10.15688/jvolsu1.2016.3.1
  9. Irgashev B.Yu. On spectral problem for one equation of high even order. Russian Math. (Iz. VUZ). 2016, 60 (7), 37-46.
  10. Gokhberg I.Ts., Krein M.G. Introduction to the Theory of Linear Non Self-Adjoint Operators. Nauka, Moscow, 1965. (in Russian)
  11. Koshanov B.D., Soldatov A.P. Boundary value problem with normal derivatives for a higher-order elliptic equation on the plane. Diff. Equations 2016, 52, (12), 1594-1609.
  12. Koshanov B., Soldatov A. About the generalized Dirichlet-Neumann problem for an elliptic equation of high order. AIP Conference Proceedings 1997, 020013 (2018). doi: 10.1063/1.5049007
  13. Yuldasheva A.V. On solvability of the boundary value problem for one even-order equation. Vestnik KRAUNC. Fiz.-Mat. Nauki 2016, 12 (1), 41-47.