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Positive radial solutions for elliptic equations with sign-changing nonlinear terms in an annulus
Complex Variables and Elliptic Equations ( IF 0.9 ) Pub Date : 2021-01-14
Yonghong Ding, Yongxiang Li

This paper deals with the existence and nonexistence of positive radial solutions of the elliptic equation Δ u = f ( | x | ,   u ) , u Ω , u | Ω = 0 ,   where Ω = { x R N : r 1 < | x | < r 2 } ,   N 3 and f C ( [ r 1 , r 2 ] × R + ) , whose sign may change. We present new eigenvalue criteria for the existence and nonexistence to this problem. The discussion is based on the fixed point index theory in cones.



中文翻译:

环上具有符号变化非线性项的椭圆型方程的正径向解

本文讨论了椭圆方程正径向解的存在性和不存在性 - Δ ü = F | X |   ü ü Ω ü | Ω = 0   哪里 Ω = { X [R ñ [R 1个 < | X | < [R 2 }   ñ 3 F C [ [R 1个 [R 2 ] × [R + ,其符号可能会改变。我们为这个问题的存在和不存在提出了新的特征值准则。讨论基于圆锥体上的不动点索引理论。

更新日期:2021-01-14
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