共查询到17条相似文献,搜索用时 93 毫秒
1.
Qin Maochang 《Annals of Differential Equations》2006,22(4):546-550
Using the Krasnoselskii's fixed point theorem, the existence of positive periodic solutions to a class of nonlinear functional difference equations is studied in this paper. Some sufficient conditions for the existence of positive periodic solutions are presented. 相似文献
2.
Bai Dingyong Xu Yuantong 《Annals of Differential Equations》2005,21(3):237-242
The paper is concerned with the existence and multiplicity of positive solutions for a nonlinear m-point boundary value problem. The proofs are based on a fixed-point theorem and a fixed-point index theorem in cones. 相似文献
3.
Wang Weibing Luo Zhiguo 《Annals of Differential Equations》2007,23(1):72-77
The existence of the positive solutions of a certain second order singular differential equation is studied. Our result is based on fixed-point theorem of cone expansion and compression. 相似文献
4.
In this paper, the existence of positive periodic solutions for infinite delay functional differential equations(FDEs for short) is discussed by utilizing a fixed point theorem on a cone in Banach space. Some results on the existence of positive periodic solutions are derived. 相似文献
5.
One predator two prey system is a research topic which has both the theoretical and practical values.This paper provides a natural condition of the existence of stable pcsitive steady-state solutions for the one predator two prey system.Under this conditon we study the existence of the positive steady-state solutions at vicinity of the triple eigenvalue by implicit function theorem,discuss the positive stable solution problem bifureated from the semi-trivial solutions containing two positive components with the help of bifurcation and perturbation methods. 相似文献
6.
In this paper,we investigate the existence and uniqueness of positive solutions to a class of singular fractional boundary value problem.The existence of positive solutions to the problem is based on a fixed point theorem in partially ordered sets. 相似文献
7.
Based on the Leggett-Williams fixed point theorem for a Banach space, we establish the existence of three positive periodic solutions for a class of delay difference equations. 相似文献
8.
Using a fixed point theorem in cones, the paper consider the existence of positive solutions for a class of second-order m-point boundary value problem. Sufficient conditions to ensure the existence of double positive solutions are obtained. The associated Green function of this problem is also given. 相似文献
9.
<正> ⅠNTRODUCTIONIn 1896,Borel established the well known theorem relative tothe distribution of moduli of values for an integral function f(z) offinlite positive order O“The exponent of convergence of the moduliof the zeros of f(z)-α is equal to Q for every constant α exceptpossiibly one value of α at most.”Afterwards he proved a moregeneral theorem in replacing a by an integral function π(z) of orderless than o. Concerning the distribution of argulnents o[" values fora meromorphic fumctionf(z) of finite positive order, Viliron discoveredin 1929 the existence of what he called “direction of Borel” and 相似文献
10.
Qin Fajin Deng Jin Xu Daoyi 《Annals of Differential Equations》2007,23(4):484-491
The existence of the multiple positive periodic solutions to a delayed state- dependent predator-prey system with non-monotonic functional response is con- sidered.Using the continuation theorem based on Mawhin's coincidence degree, some more generalized results are obtained. 相似文献
11.
Tian Yu Ge Weigao 《Annals of Differential Equations》2005,21(3):417-420
In this paper, the existence theorem for three positive solutions is presented for the singular nonlinear boundary value problem by applying the extended Five Functionals fixed point theorem. singular nonlinear boundary value problem; positive solutions; cone; fixed point theorem 相似文献
12.
Zhijian Yao 《Annals of Differential Equations》2011,(1):86-93
In this paper,by the Avery-Henderson fixed point theorem,we investigate the existence of multiple positive periodic solutions to a class of integro-differential equation. Some suficient conditions are obtained for the existence of multiple positive periodic solutions. 相似文献
13.
THE EXISTENCE OF POSITIVE SOLUTIONS TO BOUNDARY VALUE PROBLEM OF SECOND ORDER DIFFERENTIAL EQUATIONS
Juan Dai Zongfu Zhou School of Mathematical Science Anhui University Hefei 《Annals of Differential Equations》2010,(1):10-15
In this paper, a fixed point theorem in C1[0,1] space is established using the properties of the fixed point index. This theorem is applied to prove the existence of positive solution to the boundary value problems of second order differential equations. 相似文献
14.
高维时滞周期的Kolmogorov型系统的正周期解 总被引:27,自引:0,他引:27
本文应用Banach空间中的Horn不动点得到了高维时滞的周期Kolmogorov型生态系统的正周期解存在性定理,作为这个定理的应用,讨论了几类时滞的周期LotkaVolterra型系统的正周期解的存在性问题,建立了新的实用的判别准则。 相似文献
15.
16.