Let be the largest and the smallest Power of in the HOMFLY Polynomial of an oriented Link,
and be the Braid Index. Then the Morton-Franks-Williams Inequality holds,
See also Braid Index
Franks, J. and Williams, R. F. ``Braids and the Jones Polynomial.'' Trans. Amer. Math. Soc. 303, 97-108, 1987.