The following topics are covered in the course : complex algebra and functions ;
本课程包含下列各项主题：复数代数与函数；
There, Mabry found the tools he and Deiermann needed to show whether the complex algebra of the rectangular strips came out positive or negative.
在那里，他找到了他们需要的工具，用这个工具可以说明长方形面积的复杂代数公式是正确的还是错误的。
Mathematicians are familiar with this; common problems in algebra are more tractable when considered over the complex numbers than over the reals, even though complex arithmetic is more difficult.
数学家对此很熟悉；如果将代数中的常见问题考虑成复数而不是实数时，那么这些问题就更容易处理，尽管复数算法较难。
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