L2 harmonic 1-forms on complete submanifolds in Euclidean space
L2 harmonic 1-forms on complete submanifolds in Euclidean space
复制标题
DOI:
10.2996/kmj/1257948888
复制
发表时间:
2009-10
影响因子:
0.6
通讯作者:
Hai-Ping Fu;Zhen-qi Li
中科院分区:
文献类型:
--
作者:
Hai-Ping Fu;Zhen-qi Li
Let M n ð n b 3 Þ be an n -dimensional complete noncompact oriented submanifold in an ð n þ p Þ -dimensional Euclidean space R n þ p with finite total mean curvature, i.e, Ð M j H j n < y , where H is the mean curvature vector of M . Then we prove that each end of M must be non-parabolic. Denote by f the traceless second fundamental form of M . We also prove that if Ð M j f j n < C ð n Þ , where C ð n Þ is an an explicit positive constant, then there are no nontrivial L 2 harmonic 1-forms on M and the first de Rham’s cohomology group with compact support of M is trivial. As corollaries, such a submanifold has only one end. This implies that such a minimal submanifold is plane.