It has been updated to lecture 19, and Zhang Yu's lecture on advanced mathematics 18 is a mathematics textbook for postgraduate entrance examination written by Zhang Yu, a famous postgraduate teacher. According to the knowledge points in the syllabus, this book is divided into 18 lectures, and the whole book is written by Zhang Yu independently, so the title is "Zhang Yu Advanced Mathematics 18 lectures". Each class is divided into four modules: examination outline requirements, detailed content, detailed explanation of examples and concise exercises.