吴海艺 陈天兰
摘要: 用非负上凸函数的Jensen不等式和不动点指数理论讨论一类非线性差分方程组边值问题正解的存在性,得到了二阶差分方程组Dirichlet边值问题
综上所述,本文在允许非线性项f,g混合增长(尤其f是次线性的,g是超线性的)的情形下,基于非负上凸函数的Jensen不等式和上凸函数性质得到了新的不等式,再结合不动点指
数理论得到了问题(1)的先验估计,从而证明了问题(1)正解的存在性.
参考文献
[1] YANG Z L,WANG X M,LI H Y. Positive Solutions for
a System of Second-Order Quasilinear Boundary Value Problems [J]. Nonlinear Anal,2020,195: 111749-1-111749-13.
[2] CHEN T L,MA R Y,LIANG Y W. Multiple Positive Solut
ions of Second-Order Nonlinear Difference Equations with Discrete Singular -Laplacian [J]. J Difference Equ Appl,2019,25(1): 38-55.
[3] TISDELL C C. A Discrete Approach to Continuous
Second-Order Boundary Value Problems via Monotone Iterative Techniques [J]. Int J Difference Equ,2017,12(1): 145-160.
[4] HENDERSON J,NTOUYAS S K,PURNARAS I K. Positive So
lutions for Systems of Nonlinear Discrete Boundary Value Problems [J]. J Difference Equ Appl,2009,15(10): 895-912.
[5] GOODRICH C S. Existence of a Positive Solution to a System of Discr
ete Fractional Boundary Value Problems [J]. Appl Math Comput,2011,217(9): 4740-4753.
[6] GAO C H,MA R Y. Eigenvalues of Discrete Sturm-Liou
ville Problems with Eigenparameter Dependent Boundary Conditions [J]. Linear Algebra Appl,2016,503: 100-119.
[7] MA R Y,AN Y L. Global Structure of Positive Solutio
ns for Superlinear Second Order m-Point Boundary Value Problems [J]. Topol Methods Nonlinear Anal,2019,34(2): 279-290.
[8] MA R Y,GAO C H,LU Y Q. Spectrum Theory of Second-
Order Difference Equations with Indefinite Weight [J]. J Spectr Theory,2018,8(3): 971-985.
[9] MOHAMMED A,RDUKECU V D,VITOLO A. Blow-up Solutions for Fully Nonl
inear Equations: Existence,Asvmototic Estimates and Uniqueness [J]. Adv Nonlinear Anal,2019,9(1): 39-64.
[10] WANG Y,SHI Y M. Eigenvalues of Second-Order Difference Equation
s with Periodic and Antiperiodic Boundary Conditions [J]. J Math Anal Appl,2005,309(1): 56-69.
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