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Example of a surface that is homotopic to a tube and has a closed asymptotic line - MaRDI portal

Example of a surface that is homotopic to a tube and has a closed asymptotic line (Q2531215)

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Example of a surface that is homotopic to a tube and has a closed asymptotic line
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    Example of a surface that is homotopic to a tube and has a closed asymptotic line (English)
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    1968
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    differential geometry
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