证明了电能密度表达式是介电张量对称性的必然推论；
The expression of energy density is proved as the deduction of this symmetry.
该文借助于西方经济学的规模函数以及博弈论的研究成果，对当代经济社会中企业规模小型化趋势进行了数学分析，并利用数学的推论证明了企业规模不断小型化的必然性。
The fruit of scale-function in economics and the Game theory is used to analyze the tendency that the scale of enterprise in modern time become small. It is proved by mathematics' tool.
该文借助于西方经济学的规模函数以及博弈论的研究成果，对当代经济社会中企业规模小型化趋势进行了数学分析，并利用数学的推论证明了企业规模不断小型化的必然性。
The fruit of scale-function in economics and the Game theory is used to analyze the tendency that the scale of enterprise in modern time become small. It is proved by mathematics' tool.
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