讨论了包含仿紧连通空间的一些广义度量空间类的映射性质,证明了T1的连通第一可数空间是连通Lasenev空间的几乎开映像,部分回答了1998年Tkachuk关于连通空间逆像的一个问题;证明了T1的连通的具有点Gδ性质的空间是连通M1空间的几乎开映像,其中建立了M1空间的一个映射定理,回答了1976年Nyikos提出的一个问题.
In this paper the mapping properties about generalized metric spaces which are connected paracompact are discussed. It is shown that a T1 connected space with first countability is an almost-open image of a Lasenev connected space, which gives partial ansWers to a Tkachuk's question on the preimages of connected spaces in 1998. It is also shown that a T1 connected space with point-G5 property is an almost-open image of a connected M1-space, where a mapping theorem on M1-spaces is established and then answers the question posed by Nyikos P. J. in 1976.