This article is cited in 1 paper

Ordinary Differential Equations

The Hilbert and Bessel properties of systems of eigenfunctions of second-order operators

N. V. Assonova, V. D. Budaev

Smolensk State Pedagogical Institute

UDC: 517.927.25+517.984.5

Received: 08.10.1997

 English version: Differential Equations, 2000, 36:2, 169–174

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