求翻译：函数的间断点是函数研究中的一个重要问题。对于这类问题方法大致相同,都是对函数在具体点的极限或左右极限加以研究,再根据间断点的定义给出判断。本文研究了一元函数、黎曼函数、狄利克雷函数、单调函数、复合函数、导函数、可积函数几类常见函数的间断点,从而得到了一些判定这几类函数间断点类型的简便方法,并利用它们去解决一些具体问题。是什么意思？

The break point of the function is an important issue in function studies. Roughly the same method for this type of problem are on the limit of the function in a specific point or about the limit to be studied, and judgment given according to the definition of the discontinuity point. This paper stu

Function The break point is a function in the study of an important issue. Issues such as this method is more or less the same, the functions in a specific point about the limits or limits should be studied, according to the definition is always a judgment. This paper studies a unary function, Lai,

The function point of discontinuity is in a function research important question.Is approximately same regarding this kind of question method, all is or about the limit studies to the function in the concrete spot limit, again gives the judgment according to the point of discontinuity definition.Thi

Study on the discontinuous point of a function is the function of an important issue. Roughly the same method for this type of problem, is about the limit of a function at a specific point or limit look, then according to the definition of break points to judge. In this paper, a unary function, the

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