Geodesic
Positive solutions of critical quasilinear elliptic equations in $R \sp N$
Mathematica Bohemica, Tome 124 (1999) no. 2-3, pp. 149-166

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We consider the existence of positive solutions of -\Delta_pu=\lambda g(x)|u|^{p-2}u+\alpha h(x)|u|^{q-2}u+f(x)|u|^{p^*-2}u\eqno(1) in $\Bbb R^N$, where $\lambda, \alpha\in\Bbb R$, $10$ be the principal eigenvalue of -\Delta_pu=\lambda g(x)|u|^{p-2}u \quad\text{in} \Rn, \qquad\int_{\Rn} g(x)|u|^p>0, \eqno(2) with $u_1^+>0$ the associated eigenfunction. We prove that, if $\int_{\Bbb R^N}f|u_1^+|^{p^*}0$, $\int_{\Bbb R^N}h|u_1^+|^q>0$ if $1\lambda_1^+$ and $\alpha^*>0$, such that for $\lambda\in[\lambda_1^+, \lambda^*)$ and $\alpha\in[0, \alpha^*)$, (1) has at least one positive solution.
We consider the existence of positive solutions of -\Delta_pu=\lambda g(x)|u|^{p-2}u+\alpha h(x)|u|^{q-2}u+f(x)|u|^{p^*-2}u\eqno(1) in $\Bbb R^N$, where $\lambda, \alpha\in\Bbb R$, $1$, $p^*=Np/(N-p)$, the critical Sobolev exponent, and $1$, $q\ne p$. Let $\lambda_1^+>0$ be the principal eigenvalue of -\Delta_pu=\lambda g(x)|u|^{p-2}u \quad\text{in} \Rn, \qquad\int_{\Rn} g(x)|u|^p>0, \eqno(2) with $u_1^+>0$ the associated eigenfunction. We prove that, if $\int_{\Bbb R^N}f|u_1^+|^{p^*}0$, $\int_{\Bbb R^N}h|u_1^+|^q>0$ if $1$ and $\int_{\Bbb R^N}h|u_1^+|^q0$ if $p$, then there exist $\lambda^*>\lambda_1^+$ and $\alpha^*>0$, such that for $\lambda\in[\lambda_1^+, \lambda^*)$ and $\alpha\in[0, \alpha^*)$, (1) has at least one positive solution.
DOI : 10.21136/MB.1999.126255
Classification : 35B33, 35J70, 35P30, 47J30, 58E05
Keywords: positive solutions; critical exponent; the $p$-Laplacian 
Binding, Paul A.; Drábek, Pavel; Huang, Yin Xi. Positive solutions of critical quasilinear elliptic equations in $R \sp N$. Mathematica Bohemica, Tome 124 (1999) no. 2-3, pp. 149-166. doi: 10.21136/MB.1999.126255
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