Two‐Bridge Knots with Property Q

Two‐Bridge Knots with Property Q
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具有 Q 属性的双桥结

DOI:
10.1093/qjmath/52.4.447
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发表时间:
2001
影响因子:
0.7
通讯作者:
Arturo Ramírez
Arturo Ramírez
中科院分区:
数学3区
文献类型:
--
作者:
F. González;Arturo Ramírez

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一个纽结素S3具有性质Q,如果存在一个包含k的闭曲面SinS 3,使得K在H1 A和H1B中是非本原的,其中A和B是S3-S的分支的闭包。此外,如果lk(k,k+)≠ 0,其中k+包含在Sand中,且与k平行,则k具有性质Q *。我们确定了具有α/β的连分数展开的性质Qin项的2-桥结K(β/α)。本文还证明了下列条件是等价的:(i)K(β/α)具有性质Q;(ii)K(β/α)具有性质Q *;(iii)存在从K(β/α)到自由积的满同态;(iv)存在从K(β/α)到Z ~ 2 * Zd的满同态。
A knotkinS3has propertyQif there is a closed surfaceSinS3containingksuch thatkis imprimitive inH1AandH1BwhereAandBare the closures of the components ofS3–S. If, in addition,lk(k,k+) ≠ 0, wherek+is contained inSand is parallel tok, thenkhas propertyQ*. We determine the 2‐bridge knotsK(β/α) that have propertyQin terms of a continued fraction expansion of α/β. We also prove that the following conditions are equivalent: (i)K(β/α) has propertyQ; (ii)K(β/α) has propertyQ*; (iii) There is an epimorphism from the group ofK(β/α) onto a free product; (iv) There is an epimorphism from the group ofK(β/α) onto Z2* Zd.