According to the query of Wu Zhongxiang's article "Fundamentals of Advanced Mathematics", it is known that there is Cauchy integral inequality in the fourth chapter of Indefinite Integral (I).

Cauchy inequality was obtained by Cauchy, a mathematician, when he studied the problem of "flow number" in mathematical analysis.

Wu Zhongxiang, male, graduated from Xi Jiaotong University and is currently a professor at Xi Jiaotong University. He has been engaged in the research and teaching of advanced mathematics for a long time.