Abstract

We consider system of integral equations related to the weighted Hardy-Littlewood-Sobolev (HLS) inequality in a half space. By the Pohozaev type identity in integral form, we present a Liouville type theorem when the system is in both supercritical and subcritical cases under some integrability conditions. Ruling out these nonexistence results, we also discuss the positive solutions of the integral system in critical case. By the method of moving planes, we show that a pair of positive solutions to such system is rotationally symmetric aboutxn-axis, which is much more general than the main result of Zhuo and Li, 2011.

Highlights

  • In [1], Jin and Li studied the weighted HLS system of nonlinear equations in Rn: u (x) = 1 |x|α ∫ Rn 󵄨󵄨󵄨󵄨x 1 − y󵄨󵄨󵄨󵄨λVq (y) 󵄨󵄨󵄨󵄨y󵄨󵄨󵄨󵄨β dy, (1) V (x)

  • By the method of moving planes, we show that a pair of positive solutions to such system is rotationally symmetric about xn-axis, which is much more general than the main result of Zhuo and Li, 2011

  • Symmetry of solutions to integral system (8) was established by Zhuo and Li [5]

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Summary

Introduction

In [1], Jin and Li studied the weighted HLS system of nonlinear equations in Rn:. 1 − y󵄨󵄨󵄨󵄨λ up (y) 󵄨󵄨󵄨󵄨y󵄨󵄨󵄨󵄨α dy, where 0 < λ < n and 1/(p + 1) + 1/(q + 1) = (λ + α + β)/n. Symmetry of solutions to integral system (8) was established by Zhuo and Li [5] They proved that in critical case 1/(p + 1) + 1/(q + 1) = (n − α)/n, any pair of positive solutions of (7) with u ∈ Lp+1(R+n ) and V ∈ Lq+1(R+n ) is rotationally symmetric about some line parallel to xn-axis. By the Pohozaev type identity in integral form, we present a Liouville type theorem when the system (3) is in both supercritical and subcritical cases under some integrability conditions Based on these nonexistence results, we discuss the positive solutions of (3) in critical case.

Proof of Theorem 2
Proof of Theorem 3
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