期刊名称：International Journal of Mathematics and Mathematical Sciences
印刷版ISSN：0161-1712
电子版ISSN：1687-0425
出版年度：1998
卷号：21
DOI：10.1155/S0161171298001124
出版社：Hindawi Publishing Corporation
摘要：In this paper, we show that if Nm is a closed manifold with hyperhopfian fundamental
group, πi(N)=0 for 1<i≤n
and Sn is a simply connected manifold, then Nm×Sn satisfies the
property that all proper, surjective maps from an orientable (n
