Figure 15.

Eigenvalues and Betti numbers vs isovalue (c) of the fullurene (C₆₀) system with η = 0.8 × r_vdw; maxρ ≈ 2.5. i gives the Fiedler values of the T set and persistent β₀. ii presents the comparison of ${\lambda }_{l,1}^C$ and persistent β₁. iii shows the Fiedler values of the N set and persistent β₂.