The article puts forward and sets out clearly algebraic substitution axiom and the principleofduality, 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。
2
The dual law in lattice theory is introduced and some concepts and properties relative to it are discussed, while generalizing the concept ofduality and the idea of the dualityprinciple.
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。
3
The article deals briefly with the "ideal element" and "Dualityprinciple", which includes methods of teaching of the author.