"The history of the separation axioms in general topology has been convoluted, with many meanings competing for the same terms and many terms competing for the same concept."@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . "History of the separation axioms"@en . . . . . "5905"^^ . "1481097"^^ . . . "The history of the separation axioms in general topology has been convoluted, with many meanings competing for the same terms and many terms competing for the same concept."@en . . . . . . . "1103550191"^^ .