Chapter 360

Xu Qingzhou understood Gu Zhizhong's idea, so he could only nod. He wasn't in a hurry to leave and waited in the corner for the summons.

At this moment, the class bell rang.

Gu Zhizhong walked onto the stage, scanned the room, and said in a deep voice: "Students, the problem I left last week, has anyone solved it?"

Just as Gu Zhizhong expected, no one answered.

Gu Zhizhong looked at Xu Qingzhou with a smile, "Since that's the case, let your senior explain it. Come on, Little Xu, the problem is here."

Gu Zhizhong pointed to the draft paper on the podium.

Xu Qingzhou nodded. Facing everyone's gaze, he walked onto the stage calmly and first glanced at the problem on the draft paper.

【Assume p is an odd prime, a is an integer satisfying a≡0, solve...】

Whoa, no wonder Professor Gu was sure no one could handle it. The difficulty of this problem was almost enough for a graduate student.

Xu Qingzhou was thinking, and the people below the stage also held their breath.

This problem was very difficult; they had privately asked their seniors.

"Damn, Professor Gu's problem this year is so perverted."

"Relax, don't talk about you guys, even we would have to spend some effort."

"It's normal not to be able to do it. It's equivalent to giving a hell-difficulty problem at the start of freshman year. It would be a ghost if a normal person could do it."

A senior sighed: "If you run into an existence that suppresses the ages, it's not impossible to do."

"Ah?" The freshman was confused.

"That was a glorious era, with geniuses rising together... cough, wrong show. In short, our generation lived in the shadow of Study God Xu."

The senior's eyes were full of memories.

The freshmen looked at the boy's expression, their young faces full of yearning.

Gu Zhizhong was indeed doing it on purpose.

Among this year's students, there were several "troublemakers" who were very talented, like this little girl named "Xiao Yuanshan," who was smart and clever.

She was just a bit stubborn. She had just entered school and hadn't laid a solid foundation yet, but she had already started thinking about finding other ways to prove the twin prime conjecture.

A student like Xu Qingzhou appearing once in a hundred years was already luck.

Although this girl was stubborn, she was indeed a rare piece of jade.

Besides Xiao Yuanshan, there was also a boy named Lu Ruohong, who was also extraordinary.

The quality of Jingda's students this year was very high.

Everyone was not an ordinary person, so Gu Zhizhong simply raised the difficulty of the problem by one level. Let's just say, although it was freshman knowledge, seniors might be blinded by it.

In the classroom, Xiao Yuanshan's gaze was fixed on Xu Qingzhou, curious about how long it would take for a problem that was very difficult for them to be solved by Xu Qingzhou.

This senior was very amazing.

Part of the reason she came to Jingda was because of Xu Qingzhou.

This was like Mount Everest, a goal that all mountaineering enthusiasts wanted to challenge and surpass in their hearts.

The more amazing Xu Qingzhou was, the more challenging it was.

Xiao Yuanshan cheered herself on in her heart.

In the seat by the window on the left, Lu Ruohong was also waiting, wanting to know the gap between himself and Xu Qingzhou.

Xu Qingzhou browsed the problem, and a solution path quickly formed in his brain.

"This problem contains the solving of congruence equations, the application of Fermat's Little Theorem, and the application of prime distribution and sieve methods. In fact, as long as you master the basic concepts, properties, and theorems of these topics and can apply them flexibly, you can solve and prove it."

Basic problem.

Content from the first half of Mathematical Analysis 1.

It was all basic, but it was interlinked and quite complex. It was clear that Professor Gu had gone to great pains to "cool down" this group of juniors.

Xu Qingzhou picked up the chalk and wrote rapidly on the blackboard.

Below the stage, a large area of surprised gazes appeared.

Xiao Yuanshan's eyes froze. So fast? From seeing the problem to writing, it had only been a dozen seconds, right? Was the gap that big?

Gu Zhizhong held his teacup and nodded slightly. He just wanted to tell this group of young people that there are people beyond people, and heavens beyond heavens. If you want to learn mathematics well, you still have to calm down.

Don't think about nonsense all day. Do you really think everyone is Xu Qingzhou?

"Here, you need to use the Chinese Remainder Theorem and quadratic residue theory to solve it. Pay special attention to the relationship between the solutions of the quadratic residue equation modulo p^2 and the solutions modulo p."

Xu Qingzhou spoke very quickly.

Below the stage, after a brief surprise, everyone quickly entered the state, following Xu Qingzhou's train of thought to calculate.

When he talked about Pell's equation and recursive relations, some people already had confused expressions on their faces.

Xu Qingzhou wasn't flustered. He slowed down his rhythm, tapped the blackboard, and said: "At this step, the most important thing is to use the recursive properties of the solutions to Pell's equation..."

Gu Zhizhong looked at the young man talking eloquently and skillfully on the stage, his face full of undisguised praise. He thought to himself that it would be good if this kid could be a teacher; his lectures were simple and easy to understand, progressive, and very skilled.

But soon, he shook his head again. Compared to being rooted in a teaching position like him, Xu Qingzhou was still suitable for staying on the front line, adding bricks and tiles to the cause of mathematics in the Xia Nation.

Xu Qingzhou used more than half of the class to explain the problem clearly and exited the stage under everyone's worship and admiration. As for that little girl who was as excited as if she had been injected with chicken blood, he didn't pay attention.

Not everyone is like him, a cheater.

Seeing that it was already 11 o'clock, he went to the cafeteria for a meal first and then continued to verify the model.

Inspiration comes so suddenly. He was still having a headache in the morning, and suddenly he had a flash of inspiration, feeling a sense of sudden enlightenment.

Through topological structure, one can reveal strange phenomena in quantum multi-body systems, from spontaneous symmetry breaking to quantum phase transitions, and then to topological order long-range entanglement and category symmetry.

A profound dual relationship has been established between the topological structure of manifolds and the internal structure of multi-body quantum entanglement.

He was now preparing to verify this, that is, whether he could completely link the two models through topological properties without causing repulsion.

Four days passed.

Xu Qingzhou was immersed in calculations and couldn't extricate himself.

Topology has great potential.

On this, he could see hope.

Moreover, he had a premonition that the AB effect, which he had been working on for a long time, was about to yield results.

Saturday, the breeze was gentle, the weather was clear, and the brilliant sunlight fell on the ground.

Song Yao wore a white T-shirt on her upper body, a windbreaker, and high-waisted jeans on her lower body. She had a high ponytail, fully displaying her tall figure. When she went out, because she was too lazy to use an umbrella, she wore a black baseball cap, making her look cool.

The wind was good, the weather was good, and the person beside her was good, but the environment was a bit creepy.

"Ah~"

All around, screams were endless.

Xu Qingzhou listened to the screams coming from the drop tower, his kidneys trembling, "Is this the exciting thing you were talking about?"

"Exciting enough, right?" Song Yao raised her eyebrows, her eyes bright and shiny.

"Ah~"

In the distance, there was another burst of screams.

Xu Qingzhou was still terrified: "Is it... too exciting?"

"Don't you like excitement?"

"..."

This isn't the kind of excitement I wanted!

The matter had to start from last night.

At night, Xu Qingzhou was burying his head in calculations when Song Yao suddenly ran over and said she could let Xu Qingzhou experience excitement.

"What kind of excitement?" Xu Qingzhou's thoughts were instantly pulled out of the formula.

"The kind that can make your soul sublimate." School Beauty Song licked her lips.

And then, Xu Qingzhou was dragged up by Song Yao early in the morning and changed clothes to go out.

Soul can sublimate...

Not only can it sublimate, but it can also ascend to heaven.

"It's different from the excitement I thought of."

"Then what kind of excitement do you want?"

"Like..."

Under School Beauty Song's dangerous gaze, Xu Qingzhou swallowed the rest of his words. He narrowed his eyes and looked at the drop tower, "You go, I'll watch you play."

"You accompany me."

"Refuse." Song Yao hooked Xu Qingzhou's neck and encouraged: "Xu Laoshi, I believe you can do it."

"No, I can't." Xu Qingzhou shook his head seriously.

"Xu Qingzhou, I'm your girlfriend, do you have the heart to watch me sit on it alone?"

"Do you have the heart to drag your boyfriend along?"

"Yes."

"..."

"Xu Qingzhou! Are you going or not?!" Song Yao rubbed Xu Qingzhou's face.

"Not going."

"..."

Song Yao leaned into his ear and whispered: "If you accompany me, tonight... um, I can accompany you to take a bath together."

Xu Qingzhou's expression froze slightly.

(In the classroom)

Whoa, this girl couldn't coerce him, so she started to lure him!

"Do you think I'm that kind of person?" Xu Qingzhou was righteous and awe-inspiring.

"Aren't you?"

"Song Yao, you misjudged me." Xu Qingzhou let out a long sigh and shook his head slowly.

"I can also do a split..."

"Stop, hold it, I'm a serious person, please don't tell me these strange things."

Xu Qingzhou pushed away School Beauty Song, who was tempting him, lifted his foot, and without looking back—

Went to queue up at the drop tower.

Heaven and earth are vast, but accompanying his girlfriend to have fun is the most important thing.

2 minutes later.

"Welcome to the Heaven and Earth Heroes..."

The staff's voice and rhythmic music circled in his ears.

On the drop tower, Xu Qingzhou suddenly felt a bit regretful. Yes, he was a bit greedy for School Beauty Song's various skills, after all, he hadn't tried them since last time, but he wasn't the only one enjoying it.

Facing a tsundere like Song Yao, one can only proceed slowly.

Just like when he had to be beaten up just to touch a leg, now he could sit there and do nothing, and this girl would put her feet in his arms.

Too rash.

In stark contrast, next door, Song Yao was full of interest, her originally calm face now carrying a trace of excitement.

The machine slowly rose, the field of vision gradually widened, and he could vaguely see the undulating city outline in the distance.

The next moment, it plummeted rapidly.

Damn, shouldn't have been tempted by beauty!

Although he kept telling himself in his heart that he wouldn't really fly out, the feeling of being about to hang still rushed to his face.

Happy times are always short.

In front of the drop tower, Xu Qingzhou stood numbly, his spirit a bit dazed. It was truly exciting.

"Xu Laoshi, are you not capable? Don't force it, but, tonight..."

"Capable, how could I not be capable!"

Xu Qingzhou nodded affirmatively.

At noon, the two of them ate something casually in the park.

On a wooden chair, Song Yao was studying the guide map, seeing what other exciting projects were left to play. Xu Qingzhou leaned against the back of the wooden chair, "Teacher Song, girls and Ferris wheels are a better match."

"Xu Laoshi, let's go to the haunted house." Song Yao's eyes were bright.

"Okay." Xu Qingzhou nodded. He had even played the drop tower; a mere haunted house was no longer in his eyes.

Sure enough.

They were all mechanical props.

Xu Qingzhou and Song Yao walked past calmly.

Several people who also looked like students screamed repeatedly. When they went in, they were in twos and threes, and when they came out, they were holding hands, in pairs.

The sun was a bit scorching. Song Yao pressed her hat brim, hiding her face in the shadow, looking at the two girls who hadn't recovered from the shock, and doubted whether they were playing in the same haunted house.

"Is it really that scary?"

"This is called romantic interest." Xu Qingzhou said. Holding hands naturally, even hiding in the boy's arms, both knew it well.

"Do you want to act coquettish and pretend to be weak too?"

"No."

"I'll teach you." Xu Qingzhou demonstrated to Song Yao, stomped his feet, pinched his throat, "Xu Laoshi, I'm scared!"

Song Yao looked at Xu Qingzhou: "I want to hit you."

"Cough, anyway, it's like this... when girls pretend to be weak, it's easy to stimulate a boy's desire to protect."

Song Yao thought for a moment, "If I don't pretend to be weak, you won't have a desire to protect me?"

"..."

Roller coaster, pendulum...

Until 6 o'clock in the evening, Song Yao reluctantly walked out of the Happy Valley gate with Xu Qingzhou.

Except for the drop tower, Xu Qingzhou felt it was okay. Of course, maybe it was because he was numb.

After playing for a day, the two were too lazy to cook, ate lobster outside, and didn't get home until almost 8:30 at night.

Song Yao poured cat food for Er Miao, while Xu Qingzhou continued to work on his calculations. After these days of hard work, he could already protect the entangled state from the interference of the AB effect through topological structure.

He secretly glanced at Xu Qingzhou. Seeing that this guy didn't say any strange requests, she secretly breathed a sigh of relief.

Very tired, but the experience was really not the same.

The tsundere attribute made her feel a little bit of rejection in her heart. It was too perverted. How could a serious person have so many... but... she was inexplicably looking forward to it.

Song Yao couldn't help but think in her heart, "Sigh, if Xu Qingzhou forced me, it would be great. The pervert is him, not me."

Shaking her head, she leaned on the sofa and took out a law book.

On this side, Xu Qingzhou was indeed calculating seriously. He had long seen through School Beauty Song—she was an old tsundere, so she had to be cured. Hehe, he just wasn't panicked.

In the presence of a magnetic field, the phase difference of the electron wave function passing through two paths is: oφ＝ec∫adaa（r′）·dr′＝ecΦb

According to Feynman path integral theory, in the case of only a constant magnetic field, that is, not depending on time t, if a＝a（r）, φ＝0, then the time-dependent Schrödinger equation needs to be modified.

Then link it with the entangled state model.

The non-locality of multi-body entanglement in this part can be described by topological phase.

A while ago, it was a bit like tearing down the east wall to repair the west wall.

For example, after adjusting the phase change function of the wave function phase change model in the AB effect, the amplitude of the entangled state in the entangled state model had problems.

After finishing the latter, when looking back, the former didn't match up.

Topological structure just happened to be used to make up for the repulsion of the two models.

10 o'clock at night.

Song Yao yawned and secretly glanced at Xu Qingzhou again. Seeing that he was concentrating on calculations, she got up on tiptoe and stepped on her slippers to get clothes to change.

Before entering the bathroom, Song Yao glanced at Xu Qingzhou again. This guy was still burying his head in calculations.

"Only knows math every day."

School Beauty Song suddenly felt a bit resentful and entered the bathroom.

In the mirror, her skin was smooth and delicate, her body proportions were perfect, swaying with her movements.

"Knock~ knock~"

Song Yao hadn't turned on the hot water yet, so the door was pushed open, and someone who was just calculating walked in swaggeringly.

"Xu Qingzhou, what are you coming in for!"

"Just right, together."

"No, who wants to take a bath with you? If you don't leave, I'll bite you!" Song Yao stared, looking fierce.

Xu Qingzhou wasn't afraid at all and even took a step forward, pressing against Song Yao.

"Xu Qingzhou~ woo~"

(End of chapter)