2 problems

For two rigid molecules with orientations and separation encoded by $\tau=(L,U,V)$, let $\mathcal{E}(\tau)$ be the Born–Oppenheimer ground-state energy. In the limit $L\to\infty$,…

Let $Z=(Z_1,Z_2)$ describe two rigid molecular subsystems and let $N$ electrons be distributed as $N_1+N_2=N$. In the dissociation limit, the energy is the minimum over all such di…