FIG. 3.1.

Molecular domain Ω for the boundary element formulation. Γ denotes the surface of molecular interior Ω. Atomic centers z_k are contained inside Ω while mobile ions in solution occur outside Ω. x and y are used to denote points on the molecular surface and the surface normal are denoted n⃗(x) and n⃗(y). In the discrete system, x is typically used to identify a collocation point while y usually represents a quadrature point.