An invariant of one filter problem

zbMath0783.41022MaRDI QIDQ1803167

M. Gkhashim, Vasily N. Malozemov

Publication date: 29 June 1993

Published in: Vestnik St. Petersburg University. Mathematics (Search for Journal in Brave)

zbMATH Keywords

filter problem

Mathematics Subject Classification ID

Approximations and expansions (41A99)

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