“…For example, the Gauss code of the curve depicted in Figure 1 is 1, 2, 3, 1, 4, 3, 2, 5, 5, 4. (See [1] for a description of Dowker notation, which is closely related and more compact.) In this section we present an algorithm that extracts the Gauss code of a prime curve directly from the curve's VF -matrix.…”