论文标题
修改后的Helmholtz方程和相关主题的解决方案的平均值特性（调查）
Mean value properties of solutions to the modified Helmholtz equation and related topics (a survey)
论文作者
论文摘要
综述了有关修改后的Helmholtz方程解决方案的最新结果；也就是说，这些特性的各种平均值及其性能，相反和逆，以及这些解决方案与谐波函数之间的关系。
Recent results concerning solutions of the modified Helmholtz equation are reviewed; namely, various mean value properties and their corollaries, converse and inverse of these properties, and relations between these solutions and harmonic functions.
