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Any chart with at most one crossing is a ribbon chart |
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| Authors: | Teruo Nagase |
| Affiliation: | Tokai University, Department of Mathematics, 1117 Kitakaname, Hiratuka Kanagawa, 259-1292 Japan |
| Abstract: | In this paper, we shall show the one written in the title. |
| Keywords: | primary, 57Q45 secondary, 57Q35 |
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