Let G be a connected unimodular Lie group, (?) be its Lie algebra which consists of all left invariant vector fields on G. Take a base {(?)<sub>j</sub>}<sub>1</sub><sup>n</sup>,...Let G be a connected unimodular Lie group, (?) be its Lie algebra which consists of all left invariant vector fields on G. Take a base {(?)<sub>j</sub>}<sub>1</sub><sup>n</sup>, of (?), a Haar measure dy on G and a sub-Laplace operator (?)=sum from i,j to (a<sub>ij</sub>(?)<sub>i</sub>(?)<sub>j</sub>) on G, where展开更多
文摘Let G be a connected unimodular Lie group, (?) be its Lie algebra which consists of all left invariant vector fields on G. Take a base {(?)<sub>j</sub>}<sub>1</sub><sup>n</sup>, of (?), a Haar measure dy on G and a sub-Laplace operator (?)=sum from i,j to (a<sub>ij</sub>(?)<sub>i</sub>(?)<sub>j</sub>) on G, where