B—space and Br—spaces Versus Transformed Points

摘要

In this paper,we study B-spaces and Br-spaces by the transformed points of continuous,nearly open mappings.Two main results of J.D.Weston's [1] and T.Byczkowkis and R.Pol's[2] are generalized to ωμ-additive spaces and ωμ-metrizable spaces.