On upper and lower δ-precontinuous multifunctions

• Published in: Chaos, solitons and fractals Vol. 19; no. 5; pp. 1231 - 1237
• Main Authors: Park, Jin Han, Young Lee, Bu, Jung Son, Mi
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2004

In this paper we introduce and study δ-precontinuous multifunctions as a generalization of precontinuous multifunctions due to Popa [Problemy Mat. 10 (1988) 9]. Some characterizations and several properties concerning upper (lower) δ-precontinuous multifunctions are obtained. The relationships betwe...