Chapter 154

A week later.

Gu Lu has gradually become familiar with the rhythm of life as a university teacher.

I wake up at half past six in the morning, go to the playground for two morning runs, eat breakfast in the cafeteria at half past seven, and go to class at eight o'clock.

Except for Monday mornings when classes are full.

Gu Lu only has one big class on Tuesday, Wednesday, and Thursday.

On Fridays, there are no classes.

After class, Gu Lu will most likely go back to the office.

Prepare for class or delve into the second question of the minimalist program until about 6 o'clock in the afternoon.

Then after dinner, stay in the office until about ten o'clock when the building lights go out.

Gu Lu went to the running field to run two laps with the night.

Back at the apartment building, it was about half past ten in the evening.

After washing, go to bed at 11 o'clock punctually.

Of course, there are occasional cases of staying up late to cultivate immortals.

Gu Lu is well aware of the importance of a healthy body.

In the past year, because the arrangement of the senior high school teachers was too intense, Gu Lu only went back to exercise occasionally when he had free time.

But after entering the university, the time is significantly more relaxed.

Gu Lu picked up the habit of running in the morning and at night again.

"It's really empty!" On the playground, Gu Lu wiped the sweat from his forehead.

Before, he ran three or four kilometers a day, which was no problem at all.

But now, a thousand meters a day is already out of breath and tired.

Gu Lu has plans to get a fitness card, but after thinking about it, even if he does, he may not go a few times a year, and it is more appropriate to run and exercise honestly.

It's healthy, it's eco-friendly, and it doesn't waste money.

It was just perfect!

The other is the research on the second problem of the minimalist program, which is still being carried out in an orderly manner.

However, whether it can be completed within the time limit of the task, Gu Lu is still uncertain in his heart.

After all, this is the second problem of the minimalist program, a rather majestic mountain, and it is not easy for Gu Lu to climb over it.

…………

"Today we're going to talk about the limits of functions and their continuity. ”

In the first and second classes on Monday morning, Gu Lu stood on the podium and began to teach the new chapter.

"In the previous lesson, we discussed the limits of sequences, and in this lesson, we will go further into the limits of functions. ”

"If we think of a sequence as a function defined in N, then in the sequence limit there is only one state of change for the independent variable, and in the limit of the function there are six different states of change for the independent variable in the limit of the function, which leads to a variety of different forms of definition of the limit of the function. In this chapter, we will discuss the definition and properties of the limit of a function based on the fact that the independent variables tend to a given point. ”

"Look at the blackboard......

Gu Lu turned around, picked up the chalk and talked as he wrote, "To take the simplest example, we want to study the change of the function y=xsin(1/x) around x=0, but we find that sin1/x is fluctuating in the neighborhood of the point x=0, but when x tends to 0, y is infinitely close to 0 due to |y-0|=|xsin(1/x)|≤|x|. In this case, we can introduce the definition of the limit of the function. ”

After Gu Lu finished saying this paragraph, he just turned around and turned around with everyone in front of him.

I found that in a position in the back row, a small head was blocked by a mobile phone.

The camera on the phone is looking at Gu Lu.

The air in the classroom became eerily quiet.

Click, click!

The sound of the figure behind the mobile phone frantically clicking the shooting button clearly echoed in the classroom.

Gu Lu leaned on the lectern and looked in the direction of the back row with a smile, "Bai Yao, what are you doing?"

Bai Yao, who was named, was suddenly stunned.

Then he put down his phone, looking embarrassed.

Bai Yao's current appearance is an embarrassing appearance of being discovered by secretly taking pictures.

"I, I'm filming your board book, teacher......" Bai Yao's tone was still weak at first, and then she plucked up her courage, raised her head, and stared at Gu Lu with big eyes without blinking.

"Board book?" Gu Lu turned his head to look at what he had just written on the blackboard.

It's the foundation of the basics, the simplest knowledge.

Just bring a high school student and you can easily understand it.

For a student of Yan University, if such knowledge still needs to be photographed and memorized, it is indeed too much.

Although the reason given by Bai Yao was very, Gu Lu did not continue to investigate.

"Let's move on to ......"

Half an hour passed, and the four blackboards had been filled with various formulas by Gu Lu.

The students in the first class of Shuying were able to barely keep up with Gu Lu's rhythm because they carefully followed Gu Lu's teachings and did a pre-class preview in advance.

There are a few classmates, and there is even room for it.

Bi Qi has two books on his desk.

One is Mathematical Analysis, and the other is A Concise Course in Mathematical Modeling.

Biqi is dual-minded.

When Gu Lu was talking about the knowledge that he had already understood thoroughly, he focused on the modeling tutorial book.

Gu Lu gave five books on Biqi's first course of treatment.

The first book of "Probability Theory and Mathematical Statistics" has been eaten by Bi Qi in a week.

The second book, A Concise Course in Mathematical Modeling, also known as the Mathematical Modeling Primer, was almost half eaten by Bi Qi.

On the other side, Bai Yao took advantage of the interval between lectures to secretly take a few handsome photos of Gu Lu, and then smiled beautifully and saved them in a private album.

The title of the album is called - The Story My Teacher and I Had to Tell.

“…… You may have some difficulty understanding the sequence limit, so I'll give you two minutes to digest it. ”

After saying this, Gu Lu picked up the glass on the lectern table and took a sip of honeysuckle tea that moistened his throat.

And the students also took out their mobile phones and tablets one after another and took pictures of Gu Lu's board book.

So that I can't understand it in class, and I stay in class and ponder it.

Gu Lu glanced under the podium and saw a small hand raised.

"Bai Yao, what's the matter?" Gu Lu raised his eyebrows.

"Teacher, you're blocking the blackboard, can you stand next to it. Bai Yao's tone was weak.

"Uh...... All right. Gu Lu moved in the direction of the window.

Bai Yao's eyes lit up, took out her mobile phone, and the camera was pointed at Gu Lu, and she directly took a five-shot shot.

This location, sure enough, the best light!

A faint light hit Gu Lu's side face through the glass window, outlining the contours of Gu Lu's angular face.

Go back and PS again.

It couldn't be more perfect when used as a mobile phone wallpaper.

Gu Lu stood by the window, his eyes looked around the classroom, and finally landed on Bai Yao.

Then I found that the camera of Bai Yao's mobile phone was facing her.

What a good clapper book!

He was standing somewhere from the blackboard.

"Ahem. Gu Lu coughed and warned Bai Yao not to be too blatant.

Bai Yao shrank her neck, moved the angle of the mobile phone, and clicked the board book seriously.

…………

Count the end of the class.

Gu Lu walked out of the classroom, leaving the classroom full of dizzy and distended students.

At the door, Gu Lu just took out his mobile phone from his pocket, ready to see if he had contacted him during class, and received Su Xi in >