One obstruction for closedness
Jiří Rosický (1977)
Commentationes Mathematicae Universitatis Carolinae
Similarity:
Jiří Rosický (1977)
Commentationes Mathematicae Universitatis Carolinae
Similarity:
Radovan Gregor (1975)
Commentationes Mathematicae Universitatis Carolinae
Similarity:
Věra Trnková (1969)
Commentationes Mathematicae Universitatis Carolinae
Similarity: