I am forced to study this goddamn course as a requirement, and I hate the outdated overly verbose nonsense textbook, but I need to do it. I need to pass this damn course. I have

The course I took last semester https://www.bilibili.com/video/BV1WF411b7EW

我上次最后因为写的太简略写错了一点，如图 这里是（a,p1）=1 的情况, 如果 p1|a,那么 是显

马上就要建党百年了，一年一度的暑假也要到来，祝大家假期快乐，学习进步，

Menelaus （以及角元 Menelaus） 2. Ceva （以及角元 Ceva） 3. Pappus 4. Pascal 5. Desargues