This article is cited in 1 paper

Mathematical Events in the USSR

Selim Grigor'evich Krein (on his sixtieth birthday)

Yu. M. Berezanskii, N. N. Bogolyubov, Yu. L. Daletskii, M. A. Lavrent'ev, E. M. Semenov


MSC: 01A70, 35J25, 35A05, 47A52

 English version: Russian Mathematical Surveys, 1978, 33:2, 215–225

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