The dual law in lattice theory is introduced and some concepts and properties relative to it are discussed, while generalizing the concept of duality and the idea of the duality principle.
推广了对偶的概念与对偶原理的思想，在格论中引入了对偶律，并讨论了与之相关的一些概念和性质。
The exception of application system of the anti-trust law is based on "the duality" of monopoly.
反垄断法适用除外制度基于对垄断“二重性”的认识而产生。
By duality approach, we characterize the optimal control law.
并用对偶方法刻画了最优控制律的特征。
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