From Almighty Scholar to Chief Scientist

Chapter 41 Accidentally Going Out of the World Problem
Of course, it would take a certain amount of time for Teacher Xu to come up with a question, so Lin Xiao continued to read his book.

Time passed quickly, and at around nine o'clock in the evening, Lin Xiao checked the time, and when it was time to return to the hotel, he stretched himself, then began to pack up the table, ready to go back.

When he walked to the door, he remembered that Teacher Xu said that he would ask himself a few difficult questions, but Teacher Xu seemed to have left the study room just now because of something, and he hasn't come back yet.

However, he should have already worked out the question, right?

So Lin Xiao went to the podium and took a look. There were indeed a few pieces of paper with questions written on them.

In addition, there is a pile of draft paper, which is full of various formulas, quite a lot, but many draft papers are marked with a big cross.

"Ms. Xu, have you encountered any problems?"

Lin Xiao thought about it for a while, but then he didn't worry about it anymore, and picked up the few draft papers with questions written on them.

He briefly glanced at the first sheet of paper. There were questions on both sides. There were four questions in total, and they were basically advanced algebra questions, including determinants, matrices, and other categories.

Then he quickly looked at the next two sheets of paper. The second sheet also had four questions, but the third sheet had only one question. Lin Xiao didn't care what the question was, as long as it wasn't a manuscript paper.

Then he found another piece of paper from the side, and wrote on it [Mr. Xu, I took the questions you asked, and I will come to you tomorrow night—Lin Xiaoliu].

Then, he left the classroom.

Not long after, Xu Hongbing came back. He walked to the podium, saw the notes left by Lin Xiao, and smiled slightly. He racked his brains to come up with those questions, including some questions he had given to math competitions before. .

He wanted to see if Lin Xiao could write it down.

He even looked forward to tomorrow night when this boy would come and cry to him that it was too difficult to do it.

Shaking his head and not thinking about it, he turned up the desk again.

It's not like he has nothing to do when he stays here. As a mathematics professor, he is also researching some problems.

For example, recently, he is studying a world-class problem, that is, whether there are infinitely many prime numbers in the Fibonacci sequence.

The problem of prime numbers has always been discussed in the mathematics community. The famous Riemann conjecture, Goldbach's conjecture, twin prime number conjecture, Mersenne prime number distribution, etc. are all problems related to prime numbers.

Although this kind of pure number game does not seem to be very useful, it has also attracted pure mathematicians to continue to explore.

The question of whether there are infinitely many prime numbers in the Fibonacci sequence discussed by Xu Hongbing is not as famous as the Mersenne prime number, but if the proof is completed, it will definitely cause a shock in the mathematics world, and it will also be of great use to him.

Like the classmate Liu who proved Sitapan’s conjecture, after graduating, he was directly employed as a full professor at Nanzhong University at the age of 22. So if Xu Hongbing can complete the proof, what kind of benefits he can get? It is unknown, especially the field of number theory to which this problem belongs, which is an area of ​​considerable concern to many mathematicians.

But obviously, he has been researching for many days, and he still has no clue. The wasted draft paper on the desk in front of him proves how much effort he has spent.

However, Xu Hongbing's problem now is not how to prove this problem, but, what about his problem?
After he looked for the paper on his desk, he found that the paper on which he wrote the Fibonacci sequence and asked if there were infinitely many prime numbers was missing.

Where did his question go?

Is it possible...

Xu Hongbing thought of a funny thing, wouldn't Lin Xiao think it was his question and take it away?

It's really possible.

Shaking his head, take it as a 'surprise' for Lin Xiao.

Oh no, it should be 'scared'.

Of course, the premise is that Lin Xiao can write there.

He has come up with eight difficult questions that he is very satisfied with. The first four questions can definitely become the final questions in the university's advanced algebra exam, and the last four questions are definitely competition-level difficult questions, and they are also the kind of mathematics professional group. Well, if Lin Xiao could finish all the writing before the self-study tomorrow night, he would just eat the desk in front of him.

With those scratch paper.

At that time, Lin Xiao didn't make it, so he came to him, and he just comforted Lin Xiao, it's okay, taught him that this showed the importance of having a teacher, and then persuaded him to study hard with the teacher after he went to college, and don't work behind closed doors .

I believe that Lin Xiao will also follow his guidance at that time, and the premise will definitely be more limitless in the future.

Thinking of his plan, Xu Hongbing nodded in satisfaction, we must be considered a good teacher.

Afterwards, without thinking too much, he found a new draft paper, wrote down the expression of the Fibonacci sequence, and then added another [Are there infinitely many prime numbers? 】

Then, he began to try to solve this problem again.

……

Hotel, in Lin Xiao's room.

"Well, there's something wrong with the teacher's question. It's really difficult."

Lin Xiao looked at the question Xu Hongbing gave him, and fell into thinking.

He had already finished writing the four questions on the first sheet of paper, and now he was writing on the second sheet of paper, but because the difficulty suddenly increased a lot, he also felt the difficulty for a while.

If he knew that this question could be called a question in the undergraduate mathematics professional competition, he would not be so entangled, because when he faced this kind of problem, he would need a certain amount of time to think about it. After all, the depth and breadth of university mathematics, There are also knowledge aspects that have certain requirements for students.

So, it took about 5 minutes, and he finally came up with an idea.

"It took me 5 minutes, it's ridiculous."

Shaking his head, he then began to write according to the ideas he had come up with.

That's right, for him, 5 minutes is considered a certain degree of difficulty, otherwise, like the question Xu Hongbing gave him during self-study just now, he could solve it in just 1 minute, more than three points species, all belong to partial difficulty.

"what are you doing?"

At this time, Kong Huaan, who was also studying on the other side, asked him.

But Lin Xiao didn't notice what he said because he was in a state of immersion.

Seeing that Lin Xiao didn't answer, Kong Huaan couldn't help but came to Lin Xiao curiously and took a look.

After reading it, he went back silently.

Sure enough, he should be a hacker himself, mathematics is not something he should consider.

Time passed quickly, and it was 11:30.

Lin Xiao, who had been working on the questions, finally heaved a sigh of relief and put down the second piece of paper.

Looking at the time, Lin Xiao couldn't help but feel that Xu Hongbing's ability to come up with questions is really great.

It took him an hour and a half to finish writing the eight questions, the first four questions only took him 10 minutes, and the last four questions took him 10 minutes.

In particular, these questions seem to be made by Xu Hongbing on the spur of the moment.

Being able to solve so many difficult problems casually is not something any teacher can do.

"But it's finally finished, as expected of me."

With a sigh in his heart, Lin Xiao picked up the third piece of paper.

The piece of paper with only one question on it.

I saw it read: [The first two items of the sequence Fn are both 1, let Fn3=Fn1+Fn2, may I ask whether there are infinitely many prime numbers in the sequence Fn? 】

　Every time I refresh the background, when I see a recommendation ticket, I can feel the fighting spirit of code words.

　　Today's third
　　


(End of this chapter)