bn:02531417n
Noun Concept
EL
ανοικτή κάλυψη  ανοικτό κάλυμμα  ανοιχτή κάλυψη  φινέτσα
EN
In mathematics, and more particularly in set theory, a cover of a set X {\displaystyle X} is a family of subsets of X {\displaystyle X} whose union is all of X {\displaystyle X}. Wikipedia
English:
topology
set theory
mathematics
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