O professor de matemática retorna à vida cotidiana

Near six in the evening, inside a renowned university, a clear, crisp voice echoed through the lecture hall as though it were expounding some eternal truth.

A young lecturer stood at the podium, chalk in hand, leaving a trail of numbers and symbols across the blackboard while teaching advanced mathematics to the students below.

Advanced mathematics, formally known as higher mathematics, was a compulsory general course for freshmen. That was why it had been assigned a large tiered lecture hall, with six classes attending at once, nearly three hundred students in total.

Every seat in the hall was occupied. Even though the class was nearing its end, the students still sat upright and listened with utmost seriousness, not daring to let their guard down for even a moment.

Anyone seeing this scene would surely sigh in admiration: this was what the pillars of the nation looked like.

Yet in truth, what the students were thinking was: "Damn it, why is he still talking? Just tell us the key points already!"

The hall was full because final exams were approaching, and the young lecturer, Lu You, Professor Lu, had sent out an advance notice in the advanced mathematics group chat saying that attendance would be checked today, and anyone absent would lose half their usual coursework points. That meant if they did not show up today, they were essentially guaranteed to fail.

Lu You did not usually take attendance, and even when he did, he would always notify the chat in advance. He understood university students; after all, he himself h