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JOURNALS // Matematicheskie Zametki // Archive
Mat. Zametki, 1968 Volume 3, Issue 4, Pages 403–413 (Mi mzm6695)
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Example of a surface that is homotopic to a tube and has a closed asymptotic line

G. A. Kovaleva

M. V. Lomonosov Moscow State University

Abstract: The possible existence of a tube of negative Gaussian curvature with a closed asymptotic line is investigated, and an example of a closed asymptotic strip homotopic to a cylinder is formulated.

UDC: 513.78

Received: 17.10.1967


 English version: Mathematical Notes, 1968, 3:4, 257–263

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