Abstract
A spectral characterization is given to the linear operators which in a Hilbert space transform some complete orthonormal system into a conditional basis.
Original language | English |
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Pages (from-to) | 476-482 |
Number of pages | 7 |
Journal | Mathematical Notes of the Academy of Sciences of the USSR |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - Jul 1972 |
Externally published | Yes |