Hulahoop surfaces |
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| Authors: | Koichi Ogiue Nobuko Takeuchi |
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| Institution: | (1) Department of Mathematics, Tokyo Metropolitan University, Hachioji, 192-03 Tokyo, Japan;(2) Department of Mathematics, Tokyo Gakugei University, Koganei, 184 Tokyo, Japan |
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| Abstract: | A compact smooth surface of revolution which contains at least two circles through each point is either a sphere or a surface obtained by revolving a circle around a suitable axis.Dedicated to Professor Tadashi Nagano on his 60th birthday |
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