%0 Journal Article %T A Hardy Inequality with Remainder Terms in the Heisenberg Group and the Weighted Eigenvalue Problem %A Jingbo Dou %A Pengcheng Niu %A Zixia Yuan %J Journal of Inequalities and Applications %D 2007 %I Springer %R 10.1155/2007/32585 %X Based on properties of vector fields, we prove Hardy inequalities with remainder terms in the Heisenberg group and a compact embedding in weighted Sobolev spaces. The best constants in Hardy inequalities are determined. Then we discuss the existence of solutions for the nonlinear eigenvalue problems in the Heisenberg group with weights for the p-sub-Laplacian. The asymptotic behaviour, simplicity, and isolation of the first eigenvalue are also considered. %U http://dx.doi.org/10.1155/2007/32585