Atomic Integrals Containing Functions of r12 and r13

Abstract
A method, not requiring infinite series expansions, for the evaluation of atomic integrals of type ψ1(x12(x23(x3)u(r12)w(r13)dτ is given for the case where the ψi(Xi) are atomic Slater‐type functions and the uij(rij) have the general form rijn exp (—arij).