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:1986
卷号:9
DOI:10.1155/S0161171286000789
出版社:Hindawi Publishing Corporation
摘要:It is interesting that in a complete space an almost periodic motion is periodic if the null set ϕ is closed and if ϕ is not closed then every point of its trajectory is a limit point.