这部分我用的同济大学的高等数学，一共两册，是很不错的教材。
The advanced maths of the university is the same as aid that I use this part, altogether two, it is very good teaching material.
对教材《高等数学》（同济大学数学教研室主编，第四版）中关于两类平面曲线积分关系证明中的一处疏漏给出补充证明。
This paper makes some supplement for the error in demonstrating the relations between two curve line integrals in the textbook advanced mathematics (edited by Tongji university 4th edition).
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