| A Lower Bound on Unknotting Number |
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| 作者姓名： | Jiming MA Ruifeng QIU |
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| 作者单位： | JIMING MA RUIFENG QIU Institute of Mathematics，Peking University，Beijing 100871，China. Department of Mathematics，Dalian University of Technology，Dalian 116024，Liaoning，China. |
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| 摘 要： | In this paper the authors use a modified Wirtinger presentation to give a lower bound on the unknotting number of a knot in S3.
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| 关 键 词： | 节子 解节子数 交换子子群 群论 |
| 收稿时间： | 10 September 2004 |
A Lower Bound on Unknotting Number |
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| Jiming MA,Ruifeng QIU.A Lower Bound on Unknotting Number[J].Chinese Annals of Mathematics,Series B,2006,27(4):437-440. |
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| Authors: | Jiming MA and Ruifeng QIU |
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| Institution: | 1. Institute of Mathematics, Peking University, Beijing 100871, China
2. Department of Mathematics, Dalian University of Technology, Dalian 116024, Liaoning, China |
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| Abstract: | In this paper the authors use a modified Wirtinger presentation to give a lower bound on the unknotting number of a knot in S3. |
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| Keywords: | Unknotting number Knot Commutator subgroup |
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