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This paper discusses the relationship between quasi-concave and pseudo-convex in the generalized convex function in the Linear topological space and offers some conditions of equivalence.
讨论了线性拓扑空间上广义凸函数中的拟凸与伪凸之间的关系，并给出它们之间的一些等价条件。
In the first, the projective system was given in section two, and the equivalence between linear codes and projective was proofed. So we can use geometric language to describe linear codes.
本文的第二部分首先给出了射影系统的概念并且描述了线性码和射影系统之间的等价性，因而我们就可以用几何语言给出线性码一个新的描述。
This article gives the ways of thinking and path of solving the non-linear electric resistance net by means of equivalence and what should be paid attention to for reference only.
由于求解非线性电阻网络的方法比较繁琐，对初学非线性电阻网络者而言，常常感到比较困难，本文给出，利用等效的方法求解非线性电阻网络的思路和途径，以及注意事项，意在为同仁提供参考。
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