On upper and lower ( τ1,τ2 )-precontinuous multifunctions

@inproceedings{Boonpok2018OnUA,
  title={On upper and lower ( $\tau$1,$\tau$2 )-precontinuous multifunctions},
  author={Chawalit Boonpok and Chokchai Viriyapong and Montri Thongmoon},
  year={2018}
}
This paper deals with the concepts of upper and lower (τ1, τ2)-precontinuous multifunctions. Some characterizations of upper and lower (τ1, τ2)-precontinuous multifunctions are investigated. The relationships between upper and lower (τ1, τ2)precontinuous multifunctions and the other types of continuity are discussed. 
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