Unknotting numbers of quasipositive knot
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Toshifumi Tanaka
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Article
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1998
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Elsevier Science
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English
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By using a result of L. Rudolph concerning the four-genus of a classical knot, we calculate the unknotting numbers of knots. We give an example of an infinite family of two-bridge knots which have arbitrary unknotting numbers which are equal to their three-genera. We also calculate the unknotting nu