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Radially symmetric solutions of a nonlinear singular elliptic equation

  • Shu-Yu Hsu

摘要

For any \(\lambda \ge 0\) λ 0 , \(2\le n\le 4\) 2 n 4 and \(\mu _1\in \mathbb {R}\) μ 1 R , we will prove the existence of unique radially symmetric solution \(h\in C^2((0,\infty ))\cap C^1([0,\infty ))\) h C 2 ( ( 0 , ) ) C 1 ( [ 0 , ) ) for the nonlinear singular elliptic equation \(2r^{2}h(r)h_{rr}(r)=(n-1)h(r)(h(r)-1)+rh_r(r)(rh_r(r)-\lambda r-(n-1))\) 2 r 2 h ( r ) h rr ( r ) = ( n - 1 ) h ( r ) ( h ( r ) - 1 ) + r h r ( r ) ( r h r ( r ) - λ r - ( n - 1 ) ) , \(h(r)>0\) h ( r ) > 0 , in \((0,\infty )\) ( 0 , ) satisfying \(h(0)=1\) h ( 0 ) = 1 , \(h_r(0)=\mu _1\) h r ( 0 ) = μ 1 . We also prove the existence of unique analytic solution of the about equation on \([0,\infty )\) [ 0 , ) for any \(\lambda \ge 0\) λ 0 , \(n\ge 2\) n 2 and \(\mu _1\in \mathbb {R}\) μ 1 R . Moreover we will prove the asymptotic behaviour of the solution h for any \(n\ge 2\) n 2 , \(\lambda \ge 0\) λ 0 and \(\mu _1\in \mathbb {R}\setminus \{0\}\) μ 1 R \ { 0 } .