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Über die Quasiäquivalenz absoluter Basen in Kötheräumen der Klasse (f)sigma. (Russian) Zbl 0455.46008

MSC:

46A45 Sequence spaces (including Köthe sequence spaces)
46B15 Summability and bases; functional analytic aspects of frames in Banach and Hilbert spaces
46A13 Spaces defined by inductive or projective limits (LB, LF, etc.)
46A11 Spaces determined by compactness or summability properties (nuclear spaces, Schwartz spaces, Montel spaces, etc.)
46A04 Locally convex Fréchet spaces and (DF)-spaces