Figure 15

Multiple String VMT. (a) An example of a Multiple String VMT instance, with three strings. A sub-instance S_{X, Y}consists of three substrings (where X = {i₀, i₁, i₂} and Y = {j₀, j₁, j₂}). (b) Here, since j₁ < i₁ we have that X ≰ Y, and thus S_{X, Y}does not correspond to a valid sub-instance. (c) A valid split of the sub-instance is obtained by splitting each one of the corresponding substrings $s_{i_p,j_p}^p$ into a prefix $s_{i_p,q_p}^p$ and a suffix $s_{q_p,j_p}^p$.