ON THE DIFFERENT DEFINITIONS OF THE LOWER SEMICONTINUITY, UPPER SEMICONTINUITY, UPPER SEMICOMPACITY, CLOSITY AND CONTINUTIY OF THE POINT-TO-SET MAPS

DOI10.1515/dema-1978-0419zbMath0408.54001OpenAlexW2783025224MaRDI QIDQ4195568

Wieslaw Sobieszek, Pawel Kowalski

Publication date: 1978

Published in: Demonstratio Mathematica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1515/dema-1978-0419

zbMATH Keywords

set-valued mapscontinuityupper semicontinuitylower semicontinuityclositydifferent definitions

Mathematics Subject Classification ID

Set-valued maps in general topology (54C60) Weak and generalized continuity (54C08)

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Some fixed point theorems for multivalued mappings ⋮ The contingent and the paratingent as generalized derivatives for vector-valued and set-valued mappings ⋮ Unnamed Item ⋮ Multivalued mappings

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