@article{oai:ir.kagoshima-u.ac.jp:00015924,
 author = {FURUSAWA, Hitoshi and YOSHIDA, Satoru},
 journal = {鹿児島大学理学部紀要, Reports of the Faculty of Science, Kagoshima University},
 month = {Dec},
 note = {This note introduces a notion of upper continuity of relations and provides 5 equivalent conditions with the upper continuity. As the case of continuous functions, each condition characterlises upper continuous relations by respectively using open sets, neighbourhoods, interiors, closures, and closed sets. A notion of sequential continuity is also studied. We show a relevance between upper continuous relations and sequentially upper continuous relations which is, again, analogous to the case of functions.},
 pages = {1--7},
 title = {A note on upper continuity properties of relations},
 volume = {54},
 year = {2021}
}