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An infinite family of prime knots with a certain property for the clasp number

机译:无限数量的素结,具有一定的扣环性质

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摘要

The clasp number c(K) of a knot K is the minimum number of clasp singularities among all clasp disks bounded by K. It is known that the genus g(K) and the unknotting number u(K) are lower bounds of the clasp number, that is, max{g(K), u(K)} <= c(K). Then it is natural to ask whether there exists a knot K such that max{g(K), u(K)} < c(K). In this paper, we prove that there exists an infinite family of prime knots such that the question above is affirmative.
机译:结K的扣数c(K)是所有以K为界的扣盘中扣奇异性的最小数目。已知g(K)属和未打结数u(K)是扣的下界数字,即max {g(K),u(K)} <= c(K)。那么自然要问是否存在一个结k,使得max {g(K),u(K)}

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