Chapter 1837 - 1838: Figure

Hmph! Slacker.

Yan Xiaoman rolled her eyes at him, speaking arrogantly.

Generally speaking, it's easy to differentiate between the top students and slackers in school. The front rows and back rows of the classroom are exclusive seats for the top students

and slackers. As for the academic gods,

sorry, academic gods usually don't attend classes.

You can only find them in the library and dormitory.

Lin Xian chuckled lightly and said, "I sit at the back because

I've already self-studied, so I might as well do something else more interesting.

Yeah, right!

Obviously not convinced, Yan Xiaoman pulled Lin to sit in the second row. Soon, many students began walking into the classroom one after another.

When Zhou Hui entered the classroom and saw Lin Xian and Yan Xiaoman, she couldn't help but be startled for a moment, then walked over quickly. With a face full of confusion, she asked, "Weren't you two on leave to enjoy your time together?"

A hint of embarrassment flashed in Xiaoman's eyes. She couldn't possibly say she changed her mind last minute out of jealousy of her friend, could she?

Seeing this, Lin Xian saved the situation by saying, "I suddenly realized there's not much to see in Shanghai, so it's better to accompany Xiaoman to class.

After all, as long as two people are together, it doesn't matter where you go."

Zhou Hui struggled to hold back her gag reflex, with a face full of grievance.

Just finished breakfast and barely a few minutes later, got force-fed couple fluff. Is this something a person would do? Damn, I shouldn't have spoken to this pair of lovebirds.

Thinking this, Zhou Hui decided not to voluntarily talk to them until lunch, otherwise, she wouldn't be able to eat lunch. After waiting for a few minutes, the class bell rang, and the classroom immediately fell silent. However, unexpectedly, the teacher did not enter the classroom as expected. After a few more minutes, and still no sign of the teacher, the students in the classroom began to murmur quietly.

Seeing this, Lin Xian joked, "Dear, your Fudan University is quite interesting. I've only seen teachers dragging on classes; this is the first time I've seen a teacher skip class."

Yan Xiaoman pursed her lips, mumbling, "Professor Wang has always been on time before; he might have had something come up today and will be here soon." Most students in the classroom thought the same as Yan Xiaoman but after ten minutes, Professor Wang still hadn't shown up.

Lin Xian keenly noticed a few slackers in the back row getting restless, seemingly wanting to take the chance to slip away. Seeing this, he couldn't help but suggest, "Looks like Professor Wang probably isn't coming. Should we sneak out? But what if Professor Wang shows up later and takes attendance?" Xiao Mann asked worriedly. "Then what if he doesn't come? If he doesn't, we'll just treat it as a self-study class!"

Qiao Xiao raised an eyebrow and said, "Lin Xian, you just said that as long as we're together, it doesn't matter where we go. Now you're changing your mind after just a few minutes?"

Heh, men really are unreliable.

Fine, let's just self-study!

Lin Xian, having no choice, took out his phone.

Seeing this, Yan Xiaoman snatched the phone from his hand and seriously said, "Don't play with your phone, focus on your books. Aren't you studying finance? Math is pretty important."

"I already told you, I self-studied it all!" Lin Xian said helplessly.

You wouldn't die from not bragging, would you?

Qi Xiao gave him an annoyed look and pushed her textbook over, placing it between them.

Lin Xian was instantly amused.

Well, the little girl is showing off!

Always seeing herself as a top student, today I must teach her a lesson.

Thinking of this, Lin Xian asked meaningfully, "Where did your Professor Wang leave off last class?"

"Just covered Lagrange's Mean Value Theorem, why?" Yan Xiaoman asked curiously. "Pay attention, study hard!"

Lin Xian smiled slightly, and then, under Yan Xiaoman's surprised gaze, stood up and walked briskly to the podium. Seeing this, Zhou Hui couldn't help but be dumbfounded, with a face full of confusion. "What's he up to?"

"I have no idea!"

Yan Xiaoman shook her head, looking bewildered.

It wasn't just them; other students in the classroom were also a bit puzzled, all looking at Lin Xian with questioning eyes. Standing on the podium, Lin Xian looked around the classroom and said, "There's been a sudden task for Professor Wang, so he entrusted me to substitute. Everyone, keep the classroom quiet, and we're now going to start class. What's this about substitute teaching?

For a moment, everyone in the classroom had faces full of bewilderment.

Damn, we clearly saw you sitting in a student seat. How did you suddenly become a substitute teacher? Are you insulting our intelligence?

Suddenly, soft whispers filled the classroom.

Oh my, who is this guy?

Wow! Such a handsome guy, what's his major? How come we've never seen him before?

I think he really might be a substitute teacher.

Why do you say that?

It's simple; I've seen all the handsome guys in our major, but this one is unfamiliar. Also, wow, his skin is amazing!

Quiet!

Lin Xian rapped on the podium a few times with a serious face.

Seeing his stern expression, the students involuntarily closed their mouths, and the classroom returned to silence. Seeing this scene, Lin Xian nodded in satisfaction and said, "Last class, Professor Wang covered Lagrange's Mean Value Theorem, and today we'll continue with it."

Despite being young, Lin Xian had an extraordinary aura that, combined with his tone and demeanor, naturally convinced people. As a result, those students flipped open their books one after the other.

If it were older students in their junior or senior year, it wouldn't have been so easy to fool them. But these students were just freshmen, still quite naive and their mindset hadn't yet transitioned from high school, making them easier to deceive.

As for why the substitute teacher was sitting in a student seat earlier, these students thought he was probably observing their discipline.

Yeah, their imagination is quite good.

Watching the classmates around them sitting upright and listening intently, Yan Xiaoman and Zhou Hui were completely shocked. How could this be?

But soon, Yan Xiaoman snapped out of it, her eyes filled with a playful smile.

No matter how good your act is, what's the use?

There's no way you can really — Holy crap, you really can? In the next second, Yan Xiaoman's eyes widened, once again bemused, as she saw Lin Xian on the podium pick up a piece of chalk and quickly write down a formula on the blackboard before speaking eloquently.

What's remarkable is, he lectured the entire time without notes, not even looking at a textbook, relying solely on a piece of chalk.

"The Lagrange's Mean Value Theorem, as the name implies, was proven by Lagrange," Lin Xian paused, writing Lagrange's name on the board and smiling, "In mathematics, theorems and conjectures are typically named after those who propose and prove them. If you encounter an unfamiliar name of a mathematician, and want to know if they were impressive, it's simple: just recall if any conjectures or theorems are named after them."

Although not all great mathematicians have proposed or proven conjectures and theorems, those who have them named after themselves are certainly impressive! Hearing this, the students in the classroom smiled knowingly.

They felt this substitute teacher was not bad; his way of speaking was engaging, not boring at all. Before explaining the theorem, let's first get to know this mathematician. Lagrange was a French mathematician, a student of Euler, the most prominent mathematician of that time. In modern web novels, he would be a candidate for the Saint Heir or Dao-zi.

Hearing this, the students couldn't help but smile again.

Holding the chalk, Lin Xian slightly rolled up the sleeves of his trench coat, a confident smile on his face as he spoke fluently, "He made significant contributions to the theory of equations, function analysis, number theory, and the Lagrange's Mean Value Theorem is just one of many achievements. Alright, now that we've introduced the theorem's prover, let's look at its conditions now."