ON UPPER AND LOWER CONTRA-CONTINUOUS MULTIFUNCTIONS


EKİCİ E., Jafari S., Noiri T.

ANALELE STIINTIFICE ALE UNIVERSITATII AL I CUZA DIN IASI-SERIE NOUA-MATEMATICA, cilt.54, sa.1, ss.75-85, 2008 (SCI-Expanded) identifier

Özet

In 1996, DONTCHEV [4] introduced and investigated the notion of contra-continuity. In this paper we introduce and study the basic properties of upper (lower) contra-continuous multifunctions.