Cusp conditions for eigenfunctions ofn-electron systems (original) (raw)

Cusp conditions for eigenfunctions of many-electron systems are derived for scenarios involving the coalescence of more than two particles. The paper discusses the mathematical framework to extend known results for two-electron systems to n-electron systems, connecting these findings to existing theories on particle density behavior at singular points. Key conditions are established that govern the behavior of eigenfunctions in the vicinity of these coalescence points, enhancing the understanding of quantum states in more complex electron systems.