How happy is Yu Qianqian at this moment?

Zhang Yan didn't know or wanted to know. At this time, she only knew one thing... that was to find a man to get single soon. Since there was no class today... Zhang Yan stayed in her small apartment, holding her own tablet computer, and lying on the sofa to read math documents.

As an older single young woman, her life is still very monotonous, almost at the same time as two points and one line. She either stays at school or stays at home to rest. Of course... she will go shopping with her two good sisters, but it is difficult to make up for time.

Yu Qianqian is accompanied by Professor Fang every night, so life is so rich. As for Ruan Xiaomei... she has never lacked high-quality suitors around her, she is handsome and rich.

"Why..."

"Life is boring!" Zhang Yan put her tablet on the coffee table, hugged the back of her head, shaking her legs rhythmically while wondering what she was thinking. Suddenly... the phone rang, interrupting her dazed moment.

I picked it up and saw that it was my senior brother who called it.

Speaking of my senior brother, to be honest, I am a bit of a big background. He is a senior professor in the Department of Mathematics of Peking University. You should know that Peking University is a university as famous as Qing University and is the most cutting-edge academic place in the country. Being able to become a senior professor at Peking University is not only necessary to have strong connections, but also his own strength is indispensable.

My senior brother has made great contributions in the field of mathematics, but he is more arrogant. To put it bluntly... he is a bit arrogant.

"Hello?"

"Senior brother...is there anything wrong?" Zhang Yan asked casually.

"Swallow."

"I just completed a very powerful mathematical study recently. Are you interested in taking a look?" A man's voice came from the other end of the phone. He was not very young, with a hint of depression and maturity, but also magnetic.

Zhang Yan frowned, wanting to reject his kindness in his heart, but he was embarrassed to do so. In fact, Zhang Yan knew very well... His senior brother liked him very much. Although he had met several times and had a few girlfriends, he ended up leaving nothing. When asked about the reason... he always said it was not suitable. In fact, Zhang Yan knew... he was waiting for his reply.

But...

No feeling means no feeling.

Feelings must be two-way to make sense. Of course... In addition to not feeling anything, there is another very important factor, that is, they are not handsome enough, and even one-tenth of Professor Fang Shi can't achieve it.

"oh..."

"Then you send it here." Zhang Yan reluctantly agreed.

"Okay!"

"I'll send it to your email address. After reading it, let me tell you how I feel." The man opposite hung up the phone with great enthusiasm.

In a while,

Zhang Yan received an email, downloaded an attachment from it, and then opened it to read it. The picture... Zhang Yan's expression became a little solemn, and an indescribable surprise surged from the depths of her heart.

The four-color conjecture, one of the three major mathematical problems in modern world?

After seeing the introduction of the article, Zhang Yan was stunned. The four-color problem is a topological problem. Its rough description can be traced back to more than 160 years ago, and the problem is also very simple... Any map can use only four colors to make countries with common boundaries embrace different colors.

In other words, if there is no confusion, a map only needs four colors to mark.

If expressed in mathematical language... the plane is arbitrarily subdivided into non-overlapping areas, each area can always be marked with one, two, three, and four... one of these four numbers will not cause the two adjacent areas to get the same number.

Just like Fermat's Theorem, this seemingly clear conjecture soon entered the field of mathematics. Although this problem was proven by computers, the problem is... If such a problem is solved by some clever new idea, it is amazing.

If there is only one solution and it is reused, it can only prove that the solver is very smart. After all,... using computers to exhaust all the current configurations to prove this conjecture, its mathematical proof cannot be accepted by mathematicians.

key,

The problem of dyeing numbers and graph structure behind the four-color problem has not been solved, so... the mathematics community urgently needs a pure artificial mathematical proof to prove the four-color problem, as well as the problem of dyeing numbers and graph structure behind the four-color problem.

However...

My senior brother actually tried it, not only tried it, but also published a paper for it.

To be honest,

Zhang Yan was a little unbelievable. If the author of this paper was her male god Fang Qing, she might have been full of expectations, but she was a suitor she didn't like. From the perspective of emotions... she felt that there were many loopholes in it.

However, with this prejudiced emotion and opinion, reading a math article is a taboo. Zhang Yan tried hard to adjust her mood and get herself back on track, and then... she plunged into the content of this article.

At the beginning,

Zhang Yan was still calm and composed, but as the content continued to deepen, gradually... As an associate professor in the Department of Mathematics of Jiangda University, she began to become helpless. In addition to being shocked, she was full of doubts and confusion on her face.

She admitted that there was a big gap between herself and her senior brother, but she didn't understand it, right?

Through continuous exploration and in-depth exploration, Zhang Yan gradually understood the content of his senior brother's article. He just provided a way of artificial proof, and then... there was no more.

This is quite similar to Professor Fang Shin's paper, but compared to his senior brother who really only provided proof ideas, Professor Fang Shin pushed the Kratz conjecture forward for at least a hundred years, while his senior brother was standing still. At most, he just took a small step forward.

Hesitated for a while,

Zhang Yan called her senior brother, and soon... the phone went through.

"I read it... Brother, your paper is quite similar to Professor Fang Shi from our school, and they both provide a proof idea." Zhang Yan said calmly: "But... I think your math paper...what should I say..."

at this time,

The man on the other end of the phone asked urgently, "What?"

"I feel... it seems..." Zhang Yan pursed her lips. She didn't want to say too much. She pondered for a long time... and said silently: "There is a little gap with Professor Fang Shi of our school... but a little gap..."

People who are engaged in academic research in China cannot avoid one topic, that is Fang Qing... Zhang Yan's senior brother naturally knew Fang Qing. When he heard that his secret crush said... he was not as good as Fang Qing, he felt a little dissatisfied in his heart, of course... he was a little dissatisfied in his usual condition.

"swallow!"

"I recognize Professor Fang Shi's academic ability, but if you say that my paper is not as good as Professor Fang Shi's paper... I don't admit it." Senior Brother Zhang Yan said righteously.

Zhang Yan rolled her eyes and muttered in her heart... I'm already very interested. If it weren't for your sake as my senior brother, I... I would have demoted you for nothing, and I would have refuted me?

"Maybe..." Zhang Yan responded casually.

Zhang Yan's senior brother also heard his junior sister's perfunctory behavior, and he became even more dissatisfied for a moment and said seriously: "Yanzi... Do you know Professor Fang Shin?"

"I know."

"What's wrong?" Zhang Yan asked in confusion.

"I hope you can hand over my research paper to Professor Fang Shi, don't worry... I have already stored it in arXiv and will not be stolen by others." Senior Brother Zhang Yan said.

“…”

"Professor Fang Shi will not plagiarize your paper." Zhang Yan said helplessly: "Okay, okay... I'll ask you later."

"Thanks..."

After Zhang Yan's senior brother thanked him, he hesitated for a long time... and asked in a low voice: "When will you come to the capital?"

"No." Zhang Yan refused very decisively.

"Then...will I come to your place?" Zhang Yan's senior brother did not give up and continued to ask.

Zhang Yan sighed and said earnestly: "Senior brother... Forget me, it is impossible for us. You will meet someone who is more interesting than me, and then forget me when the sunset dissipates."

After the words,

He hung up directly... Looking at his mobile phone screen, Zhang Yan pursed her lips.

If you hadn't met Professor Fang, you might have made up for it. Anyway, your life after marriage is nothing more than food, rice, oil, salt, sauce, vinegar and tea. However, after meeting Professor Fang... especially when you see your good sister Qianqian, you have Professor Fang... your life is so happy and sweet.

no!

I can't make it like this!

...

...

This day,

Fang Shi wasted all his time on the standard model, and the topic of cooperation with Professor About has been officially released. In order not to make Professor About feel that he is paddling, Fang Shi planned to give him a shot of cardiotonic and first complete the theoretical framework.

In fact, Fang Qi is not very interested in high-energy physics, he works entirely for the sake of work.

"Oh, hey... I'm so tired!" Fang Qi stretched and looked at the time... It was almost time to get off work, so he immediately sorted out his desk and walked out of his office slowly.

Today, Fang Shi does not need to come to the institute every day to a large extent, but once the habit is developed, it is difficult to change. Even as the director and deputy director, he still comes to work regardless of wind and rain.

"Director Fang..."

"Director Fang..."

sometimes,

This is how invisible estrangement arises. When a former colleague becomes his own leader, he is still a little unhappy... Fang Shi understands their emotions very well, just nods in response with a smile, and does not want to have any connection with it. After all, it is still difficult to understand the human heart.

"Hello?"

"Zhang Yan treats you?"

"All three of you are here?" Fang Qi said helplessly: "Then I'll go... isn't it a bit inappropriate?"

"You must come... Zhang Yan invited you, Xiaomei and I were by the way." Yu Qianqian said softly: "Hurry up... I'm waiting for you in the old place. The three of us are already together, and you're the only one."

"Oh...come."

Fang Qing just walked out of the door and received a call from Yu Qianqian, informing someone that dinner was invited. Although he didn't really want to go, the Queen at home had to obey the order. After all,... she would control lightning from time to time.

I soon came to a certain street and saw the little arrogant Audi RS7 from a distance.

Open the car door,

They sat in the passenger seat, and at this time... Ruan Xiaomei and Zhang Yan in the back row began to bombard verbally.
To be continued...