Sobolev Mappings, Degree, Homotopy Classes and Rational Homology Spheres
Sobolev Mappings, Degree, Homotopy Classes and Rational Homology Spheres
复制标题
索博列夫映射、度数、同伦类和有理同调域
DOI:
--
复制
发表时间:
2011
期刊:
影响因子:
--
通讯作者:
P. Hajłasz
中科院分区:
文献类型:
--
作者:
P. Goldstein;P. Hajłasz
In this paper we investigate the degree and the homotopy theory of Orlicz–Sobolev mappings W1,P(M,N) between manifolds, where the Young function P satisfies a divergence condition and forms a slightly larger space than W1,n, n=dim M. In particular, we prove that if M and N are compact oriented manifolds without boundary and dim M=dim N=n, then the degree is well defined in W1,P(M,N) if and only if the universal cover of N is not a rational homology sphere, and in the case n=4, if and only if N is not homeomorphic to S4.