As the start of school is getting closer and closer, the friends of 201 have also returned to the team one after another.

The first to return to school was Liu Rui, this young man worked hard as always, and as soon as he came back, he hugged Ben Gaodai and began to review.

Although he may have discovered it himself, most of his life will not have a chance to catch up with Lu Zhou, but in addition to this great god in the bedroom, he has more realistic goals to strive for.

For example, the graduate school entrance examination.

Putting aside those idealists who shout all day long that "the graduate school entrance examination has started since the freshman year" but play with their mobile phones in the library, most people honestly delay until the last wave of old-timers finish the exam and even leave school after they start to prepare, and this kid has already started reviewing more than half a year in advance, and it seems that the plan is not small.

As for the second one to come back, it was still the head of the dormitory.

As soon as he entered the door and saw Lu Zhou, Shi Shang put down his suitcase and shouted excitedly.

"Elbow, I haven't seen you for a summer vacation, and you've pretended to be a big man!"

Lu Zhou, who was sitting in his seat studying Polignac's conjecture, raised his head and looked at him with some inexplicability.

"I'm ...... again What's wrong? ”

The conscience of heaven and earth, he hasn't made any noise during this time, why did he pretend to be a big force again?

Could it be that unconsciously, for him, the operation of pretending to be forced can already be done automatically while he is lying still?

Shi Shang sat down on the chair and said in an old-fashioned manner: "Don't be modest, you still ask what you did, I have seen you in "Nature Weekly"!" ”

That's it......

It's been almost half a month.

Looking at Shi Shang with an excited face, Lu Zhou was speechless for a while.

"You also subscribe to Nature Weekly?"

"No, but I can read the retweet on the scarf!" Shi Shang smiled and continued to ask, "How is it, is there any hope for the Nobel Prize?" ”

As soon as he heard the Nobel Prize, Liu Rui, who was reviewing, stopped doing the question, and immediately pricked up his ears.

He usually doesn't brush his neck much, at most he brushes a circle of friends, and even the fact that Lu Zhou is on the Nature Weekly is the first time he has heard of it.

However, what he didn't understand was that even if he understood that Lu Zhou went to Europe to pretend to be a big man, how could this guy be involved in mathematics and get the Nobel Prize?

Hearing Shi Shang's layman's question, Lu Zhou was happy: "I don't know, why don't you help me go to Norway to inquire?" ”

This thing is so easy to hold, it's been all over the streets for a long time.

At this moment, the door, which had just been closed by the head of the dormitory, was pushed open again.

I saw Huang Guangming, who was wearing glasses, dragging his suitcase and swaggering in with a posture that looked like a drag.

"201, your dad is back - I'll wipe it, Fei Ge spares his life, dad is wrong...... Don't don't, wait until I take off my glasses first, ah-"

Shuai is only three seconds.

Before Huang Xiaobei, who succeeded in the fight, finished speaking, he was sanctioned by the hippie smiling Feige and Liu Rui. Lu Zhou refueled next to him, and as always, he did not participate in it, and continued to study the subject at hand.

In this way, in the scream of the little bit, the 201 dormitory, which had been rested for a summer vacation, finally returned to the daily life of the new semester......

……

Strictly speaking, from the beginning of this semester, Lu Zhou can be regarded as a graduate student.

However, it seems that there is no difference in how many graduate schools he attends, anyway, he can get his graduation certificate after one year of study.

Although Academician Lu helped him draw the class schedule, there were not many classes that graduate students needed, and basically he studied mathematical problems in the library or dormitory - the Polygnac conjecture.

The infinity of twin primes has been solved, and now all that needs to be done is to find a suitable way to generalize it to the case of infinity of prime spacing.

The topological principle of sieve was no longer tried in this problem, and in order to solve this problem, he had to find a new method.

And this is also the most troublesome part of number theory.

There are so many options to choose from, and the biggest problem most people face when challenging a problem in the field of number theory is that they don't know where to start.

However, Lu Zhou's mentality was very peaceful and not too impatient.

He had already successfully solved a mathematical conjecture, and although he was not inspired at this time, he knew very well what it felt like when inspiration came.

Even without the help of "inspiration time", when the number of thoughts accumulates to a certain amount, sooner or later there will be a qualitative change, and at that time, he believes that he will be able to grasp the fleeting inspiration.

On the other hand, in addition to Lu Zhou, who has already started his first year of graduate school, the other three friends of 201 have also entered their junior year.

With the opening of elective courses, the learning task seems to be heavier than last year's copying of experimental reports.

After the class leader Tian Jun came back from the class committee meeting, he told him from bedroom to bedroom that he must check his class schedule on the Internet to see if it is correct.

Some elective courses that are not large enough or teachers do not have time this semester may be brushed off.

Generally speaking, in order to set aside time for the senior year to prepare for the graduate school entrance examination, students who are preparing for the graduate school entrance examination generally choose to spend the junior year or two semesters to complete all the credits of the elective courses.

If one subject is brushed off, it will be a headache, and you can only find a course that you have not completed to make up for it.

Unfortunately, there is such an unlucky child here.

"Damn, the actuarial math I chose was brushed off."

Sitting in front of the computer, Huang Xiaobei suddenly screamed.

As soon as he heard this scream, Shi Shang's heart tightened at first, and he quickly looked at his class schedule and found that the courses he chose were still there, so he gloated and laughed: "Okay, little bit, have ideas, are you going to go to graduate school and prepare to switch to finance?" ”

"Don't make trouble, Ma is so angry, I heard the seniors in the club group say that the teacher of this course usually has many projects, and the pine of the final management is selected, MMP, the ghost knows that he is not available this semester, and he will not start classes!" Huang Guangming had an uncomfortable expression on his face, and leaned back in his chair to death.

Yes, teachers with many projects generally do not have the same knowledge as undergraduates, and sometimes the class is taught by doctoral students.

And some are too busy, and they will be like this......

Shi Shang smiled and said: "Then you don't hurry up to the by-election, I remember that the official website of the Academic Affairs Office has opened a re-selection of courses in the past few days, and no matter how slow and good the courses are, they have been robbed." ”

"I know, I'm choosing a ......" Logging in to the official website of the Academic Affairs Office, Huang Guangming suddenly looked back at Lu Zhou and asked, "Elbow, which course is easier?" ”

Lu Zhou replied without thinking: "Mathematical modeling, I remember that it was Mr. Liu's class, and Mr. Liu is quite good." ”

If it is not for the future development direction, the principle of choosing a special course is nothing more than two. Either the content of the course is extremely simple and can be passed by a fool, or the teacher is loose and draws the range for you before the exam, and it doesn't lie to you.

Among all the professors Lu Zhou knows, it seems that Professor Liu Xiangping also meets these two conditions.

And in his opinion, the course of mathematical modeling is probably the easiest of all the courses he has been exposed to.

"I'll see," Huang Guangming leaned closer to the computer screen again and clicked the mouse, but the situation was not optimistic, "...... MMP, it's full. ”

Lu Zhou thought for a moment and continued: "Then basic number theory? I think it's pretty simple. ”

"Okay, I'll look for it...... , it's so cool, there are more than 20 vacant seats! As if he had discovered a new continent, Huang Guangming exclaimed in surprise.

However, at this moment, Liu Rui, who was sitting opposite him, suddenly splashed him with a basin of cold water.

"Give up, little bit," turning the ballpoint pen in his hand, Liu Rui raised his head and said slowly, "Don't look at the basic number theory with the word 'foundation', but this course is probably the most difficult." The elbows felt simple...... I advise you to change it. ”

Lu Zhou: "??? ”

What the heck?!

Huang Xiaobei said anxiously: ", Brother Lu, don't cheat me." ”

"Is that so? Well, I don't know exactly what a simple ...... is," Lu Zhou said with a smile.

Touching his chin and thinking for a while, Shi Shang, who hadn't spoken for a while, suddenly spoke: "Elbow, are you familiar with Professor Liu?" ”

Lu Zhou thought for a while and said, "I'm quite familiar with it, he took me to the mathematical modeling competition." ”

Shi Shang: "Then ...... Can you help the little ask? Let's see if I can add a name to the list, I remember that the professor in charge seems to have the right to adjust the list. ”

After thinking about it, it wasn't a trouble, so Lu Zhou nodded and said, "Okay, I'll ask in the afternoon." ”

"Elbow, my good brother, I'm really ......" Huang Guangming looked moved, "I don't know how to thank you!" ”

Lu Zhou smiled: "That's easy to say, then you can invite me to a meal, just the small fish village at the door." ”

Huang Guangming: "......? ”