Communications in Algebra
Analogous to the ��(n) case, we address the computation of the index of seaweed subalgebras of ��(2n) by introducing graphical representations called symplectic meanders. Formulas for the algebra’s index may be computed by counting the connected components of its associated meander. In certain cases, formulas for the index can be given in terms of elementary functions.
Coll, Vincent E. Jr., Matthew Hyatt, Colton Magnant.
Communications in Algebra, 45 (11): 4717-4729.