设K用Alexander-Briggs表示法表示素数结,s(K)=(1/2)*abs(sigma(K))和u(K)=K的unknotting数。下表给出了一些具有性质s(Ku(K)。
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|K|4_1|6_1|6_3|7_4|7_7|8_1|8_3|8_4|8_6|
-------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|s(K)|0 |0 |1 |0 |0 |0 |1|1 |0 |1 |1|
-------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|u(K)|1|1|1|2|1|1|2|2|2|
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(结束)
|