This article is cited in 3 papers

On the selection of a convergence subsystem with logarithmic density from an arbitrary orthonormal systems

G. A. Karagulian


Abstract: Theorems are proved on the selection of convergence subsystems and $S_p$-subsystems with lacunary index density.
Bibliography: 10 titles.

UDC: 517.5

MSC: Primary 42C20; Secondary 33A65, 42C30

Received: 17.06.1986

 English version: Mathematics of the USSR-Sbornik, 1989, 64:1, 41–56

Bibliographic databases:

• 
•