参考文献/References:
[1] BONHEURE D,GOMES J M,HABETS P.Multiple positive solutions of superlinear elliptic problems with sign-changing weight[J].Journal of Differential Equations,2005,214(1):36-64.
[2] KHOLKIN A M,ROFE-BEKETOV F S.On spectrum of differential operator with block-triangular matrix coefficients[J].Journal of Mathematical Physics Analysis Geometry,2014,10(1):44-63.
[3] BASKAKOV A G,DIDENKO V B.Spectral analysis of differential operators with unbounded periodic coefficients[J].Differential Equations,2015,51(3):325-341.
[4] GRUBB G.Fractional Laplacians on domains, a development of H?rmander’s theory of μ-transmission pseudodifferential operators[J].Advances in Mathematics,2014,268(18):478-528.
[5] GRUBB G.Local and nonlocal boundary conditions for μ-transmission and fractional elliptic pseudo differential operators[J].Mathematics,2014,7(7):1649-1682.
[6] MIRONOV A E.Self-adjoint commuting ordinary differential operators[J].Inventiones Mathematicae,2014,197(2):1-15.
[7] 徐有基.一类二阶广义Sturm-Liouville边界条件多点边值问题的可解性[J].西北师范大学学报(自然科学版),2008,44(4):1-5.
[8] 陈东晓,陈应生.二阶微分方程积分边值问题正解的存在性[J].华侨大学学报(自然科学版),2013,34(5):587-590.
[9] FELTRIN G,ZANOLIN F.Existence of positive solutions in the superlinear case via coincidence degree: The neumann and the periodic boundary value problems[J].Advances in Differential Equations,2015,20(9/10):937-982.
[10] HARUTYUNYAN T N.The dependence of the eigenvalues of the Sturm-Liouville problem on boundary conditions[J].Matematicki Vesnik,2008,60(4):285-294.