This article is cited in 2 papers

MATHEMATICS

Analytic semigroups and cosine functions

V. A. Kostin

Voronezh State University

UDC: 517.95

Presented: M. M. Lavrent'ev
Received: 12.04.1988

 English version: Doklady Mathematics, 1990, 40:1, 153–156

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