%0 Journal Article
%T The Bennequin number of n-trivial closed n-braids is negative
%A Oliver T. Dasbach
%A Xiao-Song Lin
%J Mathematics
%D 2000
%I arXiv
%X A famous result of Bennequin states that for any braid representative of the unknot the Bennequin number is negative. We will extend this result to all n-trivial closed n-braids. This is a class of infinitely many knots closed under taking mirror images. Our proof relies on a non-standard parametrization of the Homfly polynomial.
%U http://arxiv.org/abs/math/0010278v1