Graphs Whose Certain Polynomials Have Few Distinct Roots

Figure 5

The graphs 𝐾(𝑘,𝑡;𝑙), 𝐾^′(𝑘,𝑡;𝑙), 𝐿(𝑡,𝑙), 𝑇(𝑟,𝑘), and 𝑆(𝑟,𝑠), respectively.