arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1706.02671math.GT
收藏

周期虚纽结的Alexander不变量

Alexander invariants of periodic virtual knots

Hans U. Boden, Andrew J. Nicas, Lindsay White

摘要:

我们发现,每个周期性的虚拟结可以实现为一个周期性的虚拟辫子的封闭,并使用此研究周期性的虚拟结的亚历山大不变量。如果$K$是一个$q$ -周期和几乎经典的结,我们表明,它的商结$K_*$也几乎是经典的,并在$q=p^r$是一个素数的权力的情况下,我们建立了一个类似的Murasugi的同余关系的亚历山大多项式的$K$和$K_*$在整数模$p$。这个结果被应用到确定虚拟结$K$的可能周期的问题。一个推论是,如果$K$是一个具有非平凡Alexander多项式的几乎经典纽结,那么它是$p$ -周期的,只有100个素数$p$。结合宇称和Manturov投影,我们的方法提供了一个一般的虚拟纽结必须满足的条件,以便是$q$ -周期的。

英文摘要:

We show that every periodic virtual knot can be realized as the closure of a periodic virtual braid and use this to study the Alexander invariants of periodic virtual knots. If $K$ is a $q$-periodic and almost classical knot, we show that its quotient knot $K_*$ is also almost classical, and in the case $q=p^r$ is a prime power, we establish an analogue of Murasugi's congruence relating the Alexander polynomials of $K$ and $K_*$ over the integers modulo $p$. This result is applied to the problem of determining the possible periods of a virtual knot $K$. One consequence is that if $K$ is an almost classical knot with a nontrivial Alexander polynomial, then it is $p$-periodic for only finitely many primes $p$. Combined with parity and Manturov projection, our methods provide conditions that a general virtual knot must satisfy in order to be $q$-periodic.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑