Abstract

In this paper, we give some characterizations of almost open mappings defined on first countable spaces, which corrects some errors for almost open mappings.

Keywords: Almost open mapping, almost weak-open mapping, almost $sn$-open mapping, 1-sequence-covering mapping.

MSC: 54C05, 54C10

Pages:  181--186     

Volume  60 ,  Issue  3 ,  2008