RUS  ENG
Full version
JOURNALS // Uspekhi Matematicheskikh Nauk // Archive
Uspekhi Mat. Nauk, 1968 Volume 23, Issue 2(140), Pages 201–208 (Mi rm5615)
This article is cited in 5 papers

In the Moscow Mathematical Society

Meetings of the Moscow Mathematical Society




Received: 15.05.1967


© Steklov Math. Inst. of RAS, 2026