MINIMAL STRUCTURES, PUNCTUALLY <i>m</i> - OPEN FUNCTIONS AND BITOPOLOGICAL SPACES
TAKASHI NOIRI(1), VALERIU POPA(2)
1. 2949-1 SHIOKITA-CHO, HINAGU, YATSUSHIRO-SHI, KUMAMOTO-KEN, 869-5142 JAPAN e-mail: t.noiri@nifty.com
2. DEPARTMENT OF MATHEMATICS AND INFORMATICS, "VASILE ALECSANDRI" UNIVERSITY OF BACĂU, 600114 BACĂU, ROMANIA, e-mail:vpopa@ub.ro
Abstract
By using m-open functions from a topological space into an m-space, we establish the unified theory for several weak forms of open functions between bitopological spaces.