数学运算库源码，可用于复杂的数值计算。
Math Library source code can be used for complex numerical calculation.
在本部分中，我们将创建简单的标准数学运算(如加法和乘法)库，并将演示应用程序如何使用此库。
In this section, we will create a simple library of standard math operations such as addition and multiplication, and we will show how applications can use this library.
关系数据库的内部设计是以关系型数学运算为基础的，和这些系统需要一个预先定义的模型和明确的类型。
The internal design of relational databases is driven by relational math, and these systems require an up-front definition of schemas and types that the data will thereafter adhere to.
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