Figure 2

Cost table and graphs for k =2. \({\mathcal {G}}_{2}\): The cost graph for k=2. To avoid clutter, the k-tuple edge labels are not shown on \({\mathcal {G}}_{2}\), but on the edge table in the center. Signed \({\mathcal {G}}_{2}\) with target (+,+) is shown on the right. Note that \({\mathcal {G}}_{2}\) is independent of any data.