A Lower Bound on Unknotting Number*
Jiming Ma , Ruifeng Qiu
Chinese Annals of Mathematics, Series B ›› 2006, Vol. 27 ›› Issue (4) : 437 -440.
A Lower Bound on Unknotting Number*
In this paper the authors use a modified Wirtinger presentation to give a lower bound on the unknotting number of a knot in S 3.
Unknotting number / Knot / Commutator subgroup / 57M05 / 57M25
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Rolfsen, D., Knots and Links, Publish and Perish Inc., Berkeley, 1976. |
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Nakanishi, Y., A note on unknotting number, Math. Sem. Notes, Kobe University, 1981, 99–108. |
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