A new obstruction of quasialternating links

Khaled Qazaqzeh, Nafaa Chbili

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We prove that the degree of the Q–polynomial of any quasialternating link is less than its determinant. Therefore, we obtain a new and simple obstruction criterion for the link to be quasialternating. As an application, we identify some knots of 12 crossings or less and some links of 9 crossings or less that are not quasialternating. Our obstruction criterion applies also to show that there are only finitely many Kanenobu knots that are quasialternating. Moreover, we identify an infinite family of Montesinos links that are not quasialternating.

Original languageEnglish
Pages (from-to)1847-1862
Number of pages16
JournalAlgebraic and Geometric Topology
Issue number3
Publication statusPublished - Jun 19 2015

ASJC Scopus subject areas

  • Geometry and Topology


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