Γ -Convergence of the Heitmann–Radin Sticky Disc Energy to the Crystalline Perimeter
We consider low-energy configurations for the Heitmann–Radin sticky discs functional, in the limit of diverging number of discs. More precisely, we renormalize the Heitmann–Radin potential by subtracting the minimal energy per particle, i.e. the so-called kissing number.