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探讨了原子和分子的状态函数满足的三个条件:歧点条件、维里定理和能量梯度平均值为零的定理。施加这些条件于类氦离子的试探函数而得到的相关函数可作为原子中电子对的相关函数。
Three conditions that satisfy the state function of atom and molecule are discussed: the condition of bifurcation, the theorem of Weili theorem and the mean value of energy gradient are zero. The correlation function obtained by applying these conditions to the heuristic function of a helium-like ion can serve as a correlation function of the electron pair in the atom.