Results related to closed images of $M$-spaces, I
Results related to closed images of $M$-spaces, I
Nagata began a discussion o char- acterizations of images o M-spaces under various continuous maps (see, or instance [4] and [5]).Other images o M-spaces have been characterized by Wicke [7], Chiba [1] and by Rishel [6].One such char- acterization which has not yet been carried out is that o closed …