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Topological classification of unknotted ring defects |
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| Authors: | Hiizu Nakanishi Kiyoshi Hayashi Hiroyuki Mori |
| Affiliation: | (1) Department of Physics, Faculty of Science and Technology, Keio University, 223 Yokohama, Japan;(2) Department of Mathematics, Faculty of Science and Technology, Keio University, 223 Yokohama, Japan;(3) Present address: Faculty of Commerce, Meiji University, Eifuku, 1-9-1, Suginami-ku, 168 Tokyo, Japan |
| Abstract: | Unknotted ring defects in ordered media are classified in terms of the homotopy theory. It is also investigated what type of point defects will appear when a radius of the ring defect tends to zero. |
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