Electron. J. Diff. Eqns., Vol. 2005(2005), No. 20, pp. 1-10.

Remarks on a class of quasilinear elliptic systems involving the (p,q)-Laplacian

Guoqing Zhang, Xiping Liu, Sanyang Liu

Abstract:
We study the Nehari manifold for a class of quasilinear elliptic systems involving a pair of (p,q)-Laplacian operators and a parameter. We prove the existence of a nonnegative nonsemitrivial solution for the systems by discussing properties of the Nehari manifold, and so global bifurcation results are obtained. Thanks to Picone's identity, we also prove a nonexistence result.

Submitted July 16, 2004. Published February 8, 2005.
Math Subject Classifications: 35B32, 35J20,35J50, 35P15.
Key Words: Nehari manifold; (p,q)-Laplacian; variational methods.

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Guoqing Zhang
Department of Applied Mathematics, Xidian University
Xi'an Shaanxi, 710071, China
College of Science
University of Shanghai for science and Technology
Shanghai, 200093, China
email: zgqw2001@sina.com.cn
Xiping Liu
College of Science
University of Shanghai for science and Technology
Shanghai, 200093, China
email: xipingliu@163.com
Sanyang Liu
Department of Applied Mathematics
Xidian University
Xi'an Shaanxi, 710071, China
email: liusanyang@263.net

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