This article is cited in 1 paper

Ordinary Differential Equations

Criteria for the Bessel property and the Riesz basis property of systems of root functions of differential operators. I

V. D. Budaev

Lomonosov Moscow State University

UDC: 517.927.25

Received: 16.04.1991

 English version: Differential Equations, 1991, 27:12, 1421–1432

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