σε ενοχλούν επαγγελματίας Πλάσμα compact topology σπείρα Ανακυκλωνω οικοδόμος
Compact space - YouTube
SOLVED: 9 Countable Compactness: A metric space in which every open cover has a countable subcover is sometimes called a countably compact space. Countable compactness is not as strong condition a8 compactness,
general topology - Which of the following are compact sets? - Mathematics Stack Exchange