BitSet toEdgeVector(final int[] path) {
        final BitSet incidence = new BitSet(edges.size());
        int len = path.length - 1;
        for (int i = 0; i < len; i++) {
            incidence.set(indexOfEdge(path[i], path[i + 1]));
        }
        return incidence;
    }
BitSet toEdgeVector ( final int [ ] path ) { final BitSet incidence = new BitSet ( edges . size ( ) ) ; int len = path . length - 1 ; for ( int i = 0 ; i < len ; i ++ ) { incidence . set ( indexOfEdge ( path [ i ] , path [ i + 1 ] ) ) ; } return incidence ; }
Convert a path of vertices to a binary vector of edges. It is possible to
convert the vector back to the path using {@see #edge}.

@param path the vertices which define the cycle
@return vector edges which make up the path
@see #indexOfEdge(int, int)