...个三角函数被它的余函数所代替，则得到的新方程被称做原方程的对偶(dual)．证明下列的三角学的 对偶原理 ( principle of duality )：如果一个涉及单个角的三角方程是恒等式，则其对偶也是恒等式．
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principle of detailed balancing -----> 详细平衡原理 principle of duality -----> 对偶原理,二象性原理 principle of equivalence -----> 等效原理 ..
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对偶性原理 duality principle; principle of duality 复合性原理 principle of compositionality ..
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Dualitaetsprinzip principle of duality 对偶原理
triaxial principle of duality 空间对偶原则
principle of duality and inverse 对偶倒列
principle of directional duality 有向对偶原理
duality principle of set algebra 集合代数的对偶原理
duality principle of random walks 随机游动的对偶原理
The article puts forward and sets out clearly algebraic substitution axiom and the principle of duality, which are both universal logic laws.
提出和阐明了两个普遍的逻辑规律——代数替换公理与对偶原理。
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 article deals briefly with the "ideal element" and "Duality principle", which includes methods of teaching of the author.
本文简要而概括地介绍了“理想元素”和“对偶原理”，表明了作者在高等几何教学方法上的见解。
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