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Existence of nodal solutions for the sublinear Moore-Nehari differential equation
Discrete and Continuous Dynamical Systems ( IF 1.1 ) Pub Date : 2020-09-03 , DOI: 10.3934/dcds.2020326
Ryuji Kajikiya ,

We study the existence of symmetric and asymmetric nodal solutions for the sublinear Moore-Nehari differential equation, $ u''+h(x, \lambda)|u|^{p-1}u = 0 $ in $ (-1, 1) $ with $ u(-1) = u(1) = 0 $, where $ 0<p<1 $, $ h(x, \lambda) = 0 $ for $ |x|<\lambda $, $ h(x, \lambda) = 1 $ for $ \lambda\leq |x|\leq 1 $ and $ \lambda\in (0, 1) $ is a parameter. We call a solution $ u $ symmetric if it is even or odd. For an integer $ n\geq 0 $, we call a solution $ u $ an $ n $-nodal solution if it has exactly $ n $ zeros in $ (-1, 1) $. For each integer $ n\geq 0 $ and any $ \lambda\in (0, 1) $, we prove that the equation has a unique $ n $-nodal symmetric solution with $ u'(-1)>0 $. For integers $ m, n \geq 0 $, we call a solution $ u $ an $ (m, n) $-solution if it has exactly $ m $ zeros in $ (-1, 0) $ and exactly $ n $ zeros in $ (0, 1) $. We show the existence of an $ (m, n) $-solution for each $ m, n $ and prove that any $ (m, m) $-solution is symmetric.

中文翻译:

次线性Moore-Nehari微分方程节点解的存在性

我们研究了亚线性Moore-Nehari微分方程$ u''+ h(x,\ lambda)| u | ^ {p-1} u = 0 $ in $(-1, 1)$与$ u(-1)= u(1)= 0 $,其中对于$ | x | <\ lambda $,$,$ 0 <p <1 $,$ h(x,\ lambda)= 0 $对于$ \ lambda \ leq | x | \ leq 1 $和$ \ lambda \ in(0,1)$,h(x,\ lambda)= 1 $是一个参数。如果称它为偶数或奇数,我们称它为对称的解。对于整数$ n \ geq 0 $,如果在$(-1,1)$中有正好为$ n $零的点,则称其为解$ u $和$ n $-节点解。对于每个整数$ n \ geq 0 $和任何$ \ lambda \ in(0,1)$,我们证明该方程具有唯一的$ n $-节点对称解,其中$ u'(-1)> 0 $。对于整数$ m,n \ geq 0 $,如果在$(-1,-1中有正好为$ m $的零,我们称其为解决方案$ u $ a $(m,n)$ -solution。0)$和$(0,1)$中的正好$ n $零。我们证明了每个$ m,n $存在一个((m,n)$-解),并证明任何(m,m)$-解都是对称的。
更新日期:2020-09-03
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