This is an informal introduction to some interactions between mathematics and physics, entered around the generalizations of derivatives.
这是一篇关于数学和物理中以导数的推广为中心交流的非正式介绍文章。
The textbooks in this three-volume set combine informal, engineeringly sound practice with the rigour of formal, mathematics-based approaches.
教科书在这3卷结合起来，非正式的，土力工程健全的实践与严谨正规，数学为基础的方法。
The textbooks in this three-volume set combine informal, engineeringly sound practice with the rigour of formal, mathematics-based approaches.
教科书在这3卷结合起来，非正式的，土力工程健全的实践与严谨正规，数学为基础的方法。
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