# Search results for: V. Ja. Ivrii

*N*quantized electrons at positions

*x*

_{i}, and

*M*nuclei of charges

*Z*= (

*Z*

_{1},...,

*Z*

_{M}) fixed at positions

*y*= (

*y*

_{l},...,

*y*

_{M}). The Schrödinger Hamiltonian of such a system is given by ${H}_{Z,H}=\sum _{i=1}^{N}\left(-{\Delta}_{{x}_{i}}+{V}_{Coulomb}\left({x}_{i}\right)\right)+\frac{1}{2}\sum _{i\ne j}\frac{1}{\left|{x}_{i}-{x}_{j}\right|}$]]</EquationSource><EquationSource Format="TEX"><![CDATA[$${H_{Z,H}}...