M. Umehara, A COMPUTATION OF THE BASIC INVARIANT J(-VERTEX CURVES() FOR CLOSED 2), Journal of knot theory and its ramifications, 6(1), 1997, pp. 105-113
In this paper, we will give an explicit and simple formula for J(+)-in
variant of closed 2-vertex curves. As an application, we give an affir
mative answer to a problem conjectured by Arnold [A2], related to Lege
ndrian knots in R(2) X S-1.