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二阶微分方程组多点边值问题解的存在性
引用本文:孙茂菁,范进军. 二阶微分方程组多点边值问题解的存在性[J]. 山东师范大学学报(自然科学版), 2012, 0(3): 6-9
作者姓名:孙茂菁  范进军
作者单位:山东师范大学数学科学学院,,济南250014
摘    要:利用双锥上的不动点定理并赋予,和g-定的增长条件,证明了二阶微分方程组多点边值问题{u^n+f(t,u,kv)=0,v^n+g(t,u,v)=0,u(0)=0,u(1)=m-2∑i=1 aiu(ξi),v(0)=o,v(1)=m-2∑i=1 biv(ηi)两组正解的存在性.其中0=ξ0<ξ1<…<ξm-1=0,0=η0<η1<…ηm-2<ηm-1=1,ai≥0,t∈(0,1),且f,g:[0,1]×R^+×R^+→R是连续的.

关 键 词:Green函数  多点边值问题  不动点定理    正解

EXISTENCE OF POSITIVE SOLUTIONS FOR SECOND- ORDER MULTIPLE POINTS BOUNDARY VALUE PROBLEM
Sun Maojing Fan Jinjun. EXISTENCE OF POSITIVE SOLUTIONS FOR SECOND- ORDER MULTIPLE POINTS BOUNDARY VALUE PROBLEM[J]. Journal of Shandong Normal University(Natural Science), 2012, 0(3): 6-9
Authors:Sun Maojing Fan Jinjun
Affiliation:Sun Maojing Fan Jinjun ( School of Mathematics Science, Shandong Normal University, 250014, Jinan, China )
Abstract:For a second -order and m -point boundary value problem as follows:{u^n+f(t,u,kv)=0,v^n+g(t,u,v)=0,u(0)=0,u(1)=m-2∑i=1 aiu(ξi),v(0)=o,v(1)=m-2∑i=1 biv(ηi)where 0 =ξ0〈ξ1〈…〈ξm-1=0,0=η0〈η1〈…ηm-2〈ηm-1=1,ai≥0,t∈(0,1),且f,g:[0,1]×R^+×R^+→Ris continuous. Using fixed point theorem in a double cone and endowing certain growth conditions to f and g , we prove the existence of two positive solutions for above problem.
Keywords:Green functions  m- point boundary value problem  fixed point theorem  cone  positivesolutions
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