On upper and lower δ-precontinuous multifunctions

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...

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Bibliographic Details
Published inChaos, solitons and fractals Vol. 19; no. 5; pp. 1231 - 1237
Main Authors Park, Jin Han, Young Lee, Bu, Jung Son, Mi
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2004
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Summary: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 between upper (lower) δ-precontinuous multifunctions and some known concepts are also discussed.
ISSN:0960-0779
1873-2887
DOI:10.1016/S0960-0779(03)00313-8