Insoluble groups are another difficulty in group theory, and after more than 40 minutes of intensive knowledge bombardment, most people's brains are still buzzing. They look confused when hearing this question and dare not raise their hands to answer.

Fortunately, everyone soon noticed that Professor Xu was not looking at them, so they followed the professor's gaze with some luck.

Oh, it's the pretty girl with a strong literary flair and the boy from the physics department next to her.

Qin Ke also noticed Professor Xu's gaze, but he had no intention of standing up to answer. He was just here to accompany his girlfriend to attend the lecture, and he did not want to make a show of himself, nor did he want to offend the Yanda students in the classroom.

Seeing that Qin Ke "dare not" or "cannot" answer, the students in Yan Dali began to gloat.

A student from the Department of Physics is just taking a professional class at our School of Mathematics, but he actually dares to bring such a beautiful girlfriend to "show off". Is the professor targeting him this time?

The most "pleasant" thing is that this arrogant guy can't answer!

"Professor Xu, can you go on stage and write your answers directly?" Suddenly a boy stood up.

"Can."

The boy glanced at Qin Ke provocatively, then strode up to the blackboard and wrote out the proof process: "s2 is a commutation group, so it can be solved; [,[]={(1)}..."

After writing, he threw down the chalk coolly, grinned at Ning Qingyun, and gave Qin Ke a demonstrative look before walking back to his seat.

There are a lot of great people in Yan Dali. As soon as this student went down, two more students came up one after another. They used two different proof methods to prove Professor Xu's question. Without exception, they finished writing the answers and walked back to their seats.

, all cast provocative and mocking glances at Qin Ke.

The way top academics often attract girls' attention is to show off the subjects they are best at, especially in front of her boyfriend, and put them into dust to prove that they are far better than her boyfriend.

Professor Xu nodded slightly: "Yes, these three proof methods are okay, but they are not innovative enough. Have any other students thought of new proof methods? Especially to prove the insolvability of s5."

None of these three proof methods satisfied Professor Xu?

The Yan university students present fell silent, and even the three top students who were somewhat proud at first frowned and thought hard.

"Let me try to prove the incomprehensibility of s5." A melodious girl's voice sounded in the silence, and then the students of Yan University were surprised to see the girl wearing black-rimmed glasses and a pure white beret.

The cute literary girl with twin ponytails stood up, walked lightly onto the podium, and picked up the chalk.

A question arose in everyone's mind in surprise.

She wants to prove this difficult problem that only three top students in the entire classroom can prove?

But I saw the girl standing in front of the blackboard, holding chalk in her delicate white and jade hands. After a moment of thought, she saw the tip of the pen flying, the dust falling, and then her beautiful handwriting outlined a line in the light projected from the window.

Proof of row:

"Proof 4: If s5 is solvable, then there exists a normal subgroup n, making s5/n commutative. Assume the natural homomorphism of /n, examine the three-term cycle (a, b, c) ∈ s5, and then obtain

The other two elements are d, e.d, b, a), a, e, c)..."

"That is, there is x-1y-a,b,c)∈n. Therefore, n contains all three rotations. Similarly, its regular group sequence contains three rotations, so it cannot end at 1."

The air in the classroom was almost still at this moment, leaving only the sound of thin breathing and the eyes of astonishment and disbelief, all focused on the pretty girl on the podium.

Professor Xu was stunned for a while, with a look of admiration in his eyes, and nodded: "Yes, this method of proof is quite new..." Before he could finish his words, he suddenly stopped, and then talked to the Yanda boys in the class

Together, we stared wide-eyed at the girl with twin ponytails, and continued to write "Proof 5: Suppose n is a non-trivial normal subgroup of an..."

It took about three minutes for Juanxiu's dignified handwriting to complete "Proof of the Law 5". Then the girl bowed slightly to Professor Xu, then gently put down the chalk, and returned to her seat with a breath of fragrance that smelled like lime.

superior.

Silence, the whole place fell silent, as if the air had been sucked out. The boys opened their mouths in disbelief. They looked at "Proof 4" and "Proof 5" on the blackboard, then turned to look at the man wearing the

Wearing black-framed glasses, but still unable to conceal her stunning beauty and temperament, the girl with twin tails just felt like a fool at this moment.

I originally thought she was a liberal arts girl who came to accompany her boyfriend to attend class, but I didn't know she was actually a peerless strongman who broke the void!

Compared with her, the outstanding sophomore in the School of Mathematics at Yanda was completely crushed into scum!

I don’t know who clapped first, and soon the thunderous applause resounded throughout the classroom. The boys looked at the girl with twin tails with a kind of sacredness and piety, as if they were looking at the most perfect girl in their minds.

goddess.

Yes, she is so good-looking, has such a high IQ, and studies so well. What is she other than a goddess?

When the applause died down, many boys were asking each other, which college did this vaguely familiar and pretty girl come from? How come I had never heard of such an outstanding female student in science before?

In the midst of the whispers, the girl was heard to speak: "Is there any problem with my evidence?"

To everyone's surprise, her words were not addressed to the professor on the podium, but to her boyfriend next to her.

Everyone was stunned again, all eyes focused on the boy from the physics department.

The boy who also wore black-rimmed glasses and a blue baseball cap with the brim of the hat a little low smiled and gave a thumbs up: "No problem, it's amazing that I can come up with these two proofs in such a short time. I

Proud of you!"

The girl with twin ponytails showed a shy and touching smile, and said: "I believe you must have other ways to prove it. Go up and write it down."

This chapter is not finished yet, please click on the next page to continue reading the exciting content! The boy with glasses smiled and said: "Forget it, your two proofs are enough, don't affect the professor's class."

"But..." The girl looked at the boys around her unhappily, as if she was unhappy with the provocative looks the boys gave her boyfriend just now.

"I'm here to accompany you to class, why should I care about others?"

Hearing what the boy with glasses said, the top students at Yanda felt uncomfortable.

Damn it, you admit that it's okay for you to come to class with your girlfriend, but what's going on with your disdain for arguing with mediocre people?

A tall, thin academic who had gone to the podium to write proof 2 snorted coldly and said to himself: "I can only brag in front of girls."

He didn't even turn his head, and kept looking at the blackboard. His voice was very low, but because the classroom was very quiet, most of the people still heard it, and laughter suddenly broke out.

"squeak--!"

The sound of seats moving interrupted the harsh laughter.

But the boy with glasses suddenly stood up, shook his head, gently took off his glasses and hat, put them on the table, and then walked to the podium with his head held high.

Everyone only saw his back, and found that the boy was quite tall, over 1.8 meters tall, and had a strong build.

Professor Xu saw his face clearly and was suddenly stunned.

The boy smiled at Professor Xu: "Sorry, Professor Xu, can I waste a little time in your class?"

"You...you are free to do as you like." Professor Xu seemed not to have expected that this boy would appear in his class, and he did not recover for a moment.

I saw the boy pick up the chalk, and in less than half a second, he raised the pen and wrote three words in a straight handwriting - "Proof of Law 6".

His writing speed was very fast, his movements were smooth and smooth, and it was dazzling. In less than a minute, "Zhengfa 6" was completed.

Then this boy, who had just been laughed at by the students of Yan University for only bragging in front of his girlfriend, did not give everyone any time to digest, and continued to unleash the second round of impact.

"Proof 7: Suppose φ∈ rotates...".

The entire classroom was dumbfounded, watching helplessly as he wrote from "Proof 7" to "Proof 9", writing densely in the remaining space on the blackboard. As he went to the back, the mathematical symbols became more difficult to understand.

, even the three most powerful math students in Yan Dali looked confused, their faces were ashen from the blow, and their mouths were wide open and they could not close their mouths.

Only Ning Qingyun's eyes were shining, she pursed her lips and smiled softly, looking at her boyfriend on the stage with pride.

At the end of writing, the boy finally stopped writing and said to Professor Xu: "I'm sorry, Professor Xu, there is no room on the blackboard. I won't write Proof of Law 10 and Proof of Proof 111. Is that okay?"

At this moment, under the podium, the students at Yan'an University felt that his back was unusually tall, as if he was like an unattainable mountain, weighing down everyone's breath.

The three top students who had been provocative before felt their faces burning, as if they had been slapped several times from left to right.

Professor Xu watched it for a long time, especially Zhengfa 9. He watched it for almost two minutes before showing a smile of surprise and appreciation and said: "It turns out it's you. No wonder I don't even need to take notes. How could you two come to listen to me?"

class?”

"Professor Tian Jianlan recommended it, saying that your 'Abstract Algebra' course is the best in the country. Let us come and observe and learn a thing or two."

Professor Xu shook his head and said with a smile: "With your current level, isn't it a waste of your time to come to my class?"

The boy hurriedly said: "What the hell, I listened to your class with great interest, especially your alternative interpretation of the conjugate class of symmetry groups in class, which benefited me a lot."

"Okay, okay, stop flattering me. If you two really like it, come and listen to it more. I can also print two more copies of the exam papers for you to practice. But don't hit my students like you did today.

I'm afraid they will become autistic collectively." Professor Xu laughed heartily at the end.

The boy smiled shyly: "Isn't this forced? You can't be bullied in front of your girlfriend and remain silent, right?"

"You... ok, go back and sit down, I'm going to continue my lecture."

Seeing the conversation between the boy and Professor Xu, who seemed to be familiar with each other, all the Yanda students were even more confused.

Until then, the boy finally came to his senses and walked off the stage, and everyone saw his face clearly for the first time.

I don’t know who took a breath first and said in a voiceless voice: "Qin...Qin Ke?"

The whole classroom suddenly exploded.

"Damn it, I was wondering who could be so terrifying, but it turns out it's the famous Qin Shen!"

"Hey, is that girl just now... classmate Ning?"

"It's Classmate Ning. No wonder I always feel that she looks familiar! Come to think of it, besides Classmate Ning, who else in the world is a female student who is so good at science and so good-looking?"

"Why do you two academic masters come to our school to attend classes? Do you think our Yan University is better? Welcome to join our Yan University!"

"When it comes to mathematics, we, Yan Daniu and Qin Shen, come to be our alumni. By the way, give me an autograph after class is over!"

Qin Ke smiled slightly: "Hello everyone, Ning and I are just ordinary students next to each other. Professor Xu's class time is precious, I hope everyone will cherish it."
To be continued...