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具有次线性和超线性项的非线性椭圆型方程组最小正解的存在性 被引量:1

Existence of the Minimal Positive Solution of Some Nonlinear Elliptic Systems When the Nonlinearity is the Sum of a Sublinear and a Superlinear Term
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摘要 证明了对每一 λ∈ (0 ,Λ) ,当Λ >0时半线性椭圆型方程组  -Δu=λu|u|q- 1+u|u|p- 1-v   (在Ω中 ) ,-Δv =δu-γv (在Ω中 ) ,u=v=0 (在 Ω上 ) · 有最小正解(uλ,vλ) · 其中Ω RN(N≥ 2 )为具有光滑边界的有界区域 ,0 <q <1<p· 并且uλ,vλ 关于λ是严格递增的· It is shown that there exists Λ>0 such that, for every λ∈(0,Λ), the semilinear elliptic system: - Δ u=λu|u| q-1 +u|u| p-1 -v in Ω, - Δ v=δu-γv in Ω,u=v=0 on Ω,where Ω∈R N(N≥2) is a bounded domain with smooth boundary and 0<q<1<p,has a minimal positive solution (u λ,v λ). Moreover: u λ and v λ are strictly increasing with respect to λ.
出处 《应用数学和力学》 CSCD 北大核心 2000年第3期253-259,共7页 Applied Mathematics and Mechanics
关键词 非线性 椭圆型方程 超线性项 最小正解 存在性 reaction diffusion system positive solution nonlinear equation
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