a Department of Mathematics, Harbin Institute of Technology, Harbin, 150001, China b Department of Mathematics, Tianjin University, Tianjin, 300072, China c Department of Mathematics, New Mexico State University, Las Cruces, NM 88003, USA
Abstract:
We establish an open mapping theorem which is independent of continuity and linearity of concerned mappings. This is a substantial improvement of the classical version and its generalizations.