Author: Ilia Nikiforov, University of Minnesota This Test uses LAMMPS to compute the cohesive energy and lattice constant of graphene using conjugate gradient minimization with an initial guess of 2.5 Angstroms for the equilibrium lattice constant. The relaxation carried out by LAMMPS via its 'minimize' command is a conjugate gradient minimization (more specifically, of the Polak-Ribiere variety).