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November  2013, 12(6): 2685-2696. doi: 10.3934/cpaa.2013.12.2685

Regularity, symmetry and uniqueness of positive solutions to a nonlinear elliptic system

Shiren Zhu 1, , Xiaoli Chen 1, and  Jianfu Yang 1,

1. 

Department of Mathematics, Jiangxi Normal University, Nanchang, Jiangxi 330022, China, China, China

Received  September 2012 Revised  December 2012 Published  May 2013

In this paper, we are concerned with properties of positive solutions of the following fractional elliptic system \begin{eqnarray} {(-\Delta+I)}^{\frac{\alpha}{2}}u=\frac{u^pv^q}{|x|^\beta}, \quad {(-\Delta+I)}^{\frac{\alpha}{2}}v=\frac{v^pu^q}{|x|^\beta}\quad in\quad R^n, \end{eqnarray} where $n \geq 3$, $0 \le \beta < \alpha < n$, $ p, q>1$ and $p+q<\frac{n+\alpha-\beta}{n-\alpha+\beta}$. We show that positive solutions of the system are radially symmetric and belong to $L^\infty(R^n)$, which possibly implies that the solutions are locally Hölder continuous. Moreover, if $ \alpha=2, \beta =0,p\le q$, we show that positive solution pair $(u,v)$ of the system is unique and $u=v = U$, where $U$ is the unique positive solution of the problem \begin{eqnarray} -\Delta u + u = u^{p+q}\quad {\rm in}\quad \mathbb{R}^n. \end{eqnarray}
Keywords: uniqueness, Bessel kernel., Regularity, radially symmetry.
Mathematics Subject Classification: Primary: 35J25, 47G30, 35B453, 35J7.
Citation: Shiren Zhu, Xiaoli Chen, Jianfu Yang. Regularity, symmetry and uniqueness of positive solutions to a nonlinear elliptic system. Communications on Pure & Applied Analysis, 2013, 12 (6) : 2685-2696. doi: 10.3934/cpaa.2013.12.2685
References:
[1]

W. Chen and C. Li, "Methods on Nolinear Elliptic Equation,", AIMS Ser. Differ. Dyn. Syst., (2010).   Google Scholar

[2]

W. Chen, C. Li and B. Ou, Classification of solutions for an integral equation,, Comm Pure Appl Math, 59 (2006), 330.  doi: 10.1002/cpa.20116.  Google Scholar

[3]

X. Chen and J. Yang, Regularity and symmetry of positive solutions of an integral system,, Acta Math. Sci., 32B (2012), 1759.   Google Scholar

[4]

T. Kanna and M. Lakshmanan, Exact soliton solutions, shape changing collisions, and partially coherent solitons in coupled nonlinear Schrödinger equations,, Phys. Rev. Lett., 86 (2001), 5043.  doi: 10.1103/PhysRevLett.86.5043.  Google Scholar

[5]

M. Kwong, Uniqueness of positive solutions of $\Delta u-u+u^p=0$ in $\mathbbR^n$,, Arch. Ration. Mech. Anal., 105 (1989), 243.  doi: 10.1007/BF00251502.  Google Scholar

[6]

Y. Li, Remark on some conformlly invariant integral equations: The method of moving spheres,, J. Eur. Math. Soc., 6 (2004), 153.  doi: 10.4171/JEMS/6.  Google Scholar

[7]

C. Li and L. Ma, Uniqueness of positive bound states to Schrödinger systems with critical exponents,, SIAM J. Math. Anal., 40 (2008), 1049.   Google Scholar

[8]

T. C. Lin and J. Wei, Ground state of N coupled nonlinear Schrödinger equations in $\mathbbR^n, n\leq 3$,, Commun. Math. Phys., 255 (2005), 629.  doi: 10.1007/s00220-005-1313-x.  Google Scholar

[9]

T. C. Lin and J. Wei, Spikes in two coupled nonlinear Schrödinger equations,, Ann. Inst. H. Poincar\'e Anal. Non Lin\'eaire, 22 (2005), 403.  doi: 10.1016/j.anihpc.2004.03.004.  Google Scholar

[10]

L. Ma and D. Chen, Radial symmetry and monotonicity for an integral equation,, J. Math. Anal. Appl., 342 (2008), 943.  doi: 10.1016/j.jmaa.2007.12.064.  Google Scholar

[11]

L. Ma and D. Chen, Radial symmetry and uniqueness for positive solutions of a Schrödinger type systems,, Mathematical and Computer Modelling, 49 (2009), 379.  doi: 10.1016/j.mcm.2008.06.010.  Google Scholar

[12]

L. Ma and L. Zhao, Uniqueness of ground states of some coupled nonlinear Schrödinger systems and their application,, J. Diffe. Equa., 245 (2008), 2551.  doi: 10.1016/j.jde.2008.04008.  Google Scholar

[13]

Y. Zhao and Y. Lei, Asymptotic behavior of positive solutions of a nonlinear integral system,, Nonlinear Anal., 75 (2012), 1989.  doi: 10.1016/j.na.2011.09.051.  Google Scholar

show all references

References:
[1]

W. Chen and C. Li, "Methods on Nolinear Elliptic Equation,", AIMS Ser. Differ. Dyn. Syst., (2010).   Google Scholar

[2]

W. Chen, C. Li and B. Ou, Classification of solutions for an integral equation,, Comm Pure Appl Math, 59 (2006), 330.  doi: 10.1002/cpa.20116.  Google Scholar

[3]

X. Chen and J. Yang, Regularity and symmetry of positive solutions of an integral system,, Acta Math. Sci., 32B (2012), 1759.   Google Scholar

[4]

T. Kanna and M. Lakshmanan, Exact soliton solutions, shape changing collisions, and partially coherent solitons in coupled nonlinear Schrödinger equations,, Phys. Rev. Lett., 86 (2001), 5043.  doi: 10.1103/PhysRevLett.86.5043.  Google Scholar

[5]

M. Kwong, Uniqueness of positive solutions of $\Delta u-u+u^p=0$ in $\mathbbR^n$,, Arch. Ration. Mech. Anal., 105 (1989), 243.  doi: 10.1007/BF00251502.  Google Scholar

[6]

Y. Li, Remark on some conformlly invariant integral equations: The method of moving spheres,, J. Eur. Math. Soc., 6 (2004), 153.  doi: 10.4171/JEMS/6.  Google Scholar

[7]

C. Li and L. Ma, Uniqueness of positive bound states to Schrödinger systems with critical exponents,, SIAM J. Math. Anal., 40 (2008), 1049.   Google Scholar

[8]

T. C. Lin and J. Wei, Ground state of N coupled nonlinear Schrödinger equations in $\mathbbR^n, n\leq 3$,, Commun. Math. Phys., 255 (2005), 629.  doi: 10.1007/s00220-005-1313-x.  Google Scholar

[9]

T. C. Lin and J. Wei, Spikes in two coupled nonlinear Schrödinger equations,, Ann. Inst. H. Poincar\'e Anal. Non Lin\'eaire, 22 (2005), 403.  doi: 10.1016/j.anihpc.2004.03.004.  Google Scholar

[10]

L. Ma and D. Chen, Radial symmetry and monotonicity for an integral equation,, J. Math. Anal. Appl., 342 (2008), 943.  doi: 10.1016/j.jmaa.2007.12.064.  Google Scholar

[11]

L. Ma and D. Chen, Radial symmetry and uniqueness for positive solutions of a Schrödinger type systems,, Mathematical and Computer Modelling, 49 (2009), 379.  doi: 10.1016/j.mcm.2008.06.010.  Google Scholar

[12]

L. Ma and L. Zhao, Uniqueness of ground states of some coupled nonlinear Schrödinger systems and their application,, J. Diffe. Equa., 245 (2008), 2551.  doi: 10.1016/j.jde.2008.04008.  Google Scholar

[13]

Y. Zhao and Y. Lei, Asymptotic behavior of positive solutions of a nonlinear integral system,, Nonlinear Anal., 75 (2012), 1989.  doi: 10.1016/j.na.2011.09.051.  Google Scholar

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