With the triad mathematical method characterized by three order matrix( two order tensor), the author has derived the equations for triad physical system and proposed a way for three-body problem and the model of triad cosmos.

• 采用以三阶方阵(阶张量)写三元相互作用为特征的三元数学方法，根据最小作用量原理导出了三元物理系统方程组，由此提出了解决三体问题的途径，并提出了三元宇宙模型。