At this moment, Shen Qi entered a state of selflessness.

He ignores everything but mathematics.

Students coming and going, aunts cleaning up the tableware, and loving couples not far away.

Air, all air.

Illusion, all illusory.

So what is real?

It is the most authentic truth that this paper can be written.

"It is said that the academic world in China is chaotic. I can't see the truth. This weirdo in the mathematics academy is a clear stream in the academic world. I don't know what problems he is thinking about, but I think it must be related to mathematics. Thinking about mathematics problems these days can It's rare to reach the state of meditation." The girl couldn't help but chatted with her engineering boyfriend opposite.

"Qingliu? He is the most dangerous mudslide in Yan University. I've never seen a freshman pretending to be B like this." In the circle, tease my sister after eating, forcefully pretend to be B, all people and gods are angry!

"Hey, you're only a sophomore, okay? How many freshmen have you seen?" The girl smiled, skillfully peeled off a shrimp and put it on the boy's dinner plate.

"Let's go, let's go to the movies." The engineering man didn't want to stay here any longer.

"I haven't finished eating the prawns yet. Let's go after eating. Don't waste it." The girl continued to peel the prawns.

Faced with the logic problem of the generalized Jacobian matrix algorithm for semi-smooth equations, Shen Qi was about to collapse, with no ideas, no ideas at all.

In fact, there are too many and too complicated thoughts, but there is nothing to do.

The phone vibrated, Shen Qi took it out to have a look, and Ouye sent a WeChat message: "Algorithm for a Class of Determinant Characteristic Equations" has been completed, can you change it?"

Below the dialog box is an attachment, an algorithm for a class of determinant characteristic equations.pdf.

Shen Qi was inexplicably stimulated, Ouye finished writing a paper in less than four days?

Click on the PDF paper document, and Shen Qi quickly reviewed it. The title of the paper is "Algorithms for a Class of Determinant Characteristic Equations", which was chosen by him.

The rest of the work except the title of the thesis was done by Ou Ye, based on the outline of Shen Qi's thesis.

Shen Qi-Ou Ye

Department of Mathematics, School of Mathematical Sciences, Yanda-Capital-100000

Abstract: In this paper, using the inertia of the variable quadratic form, an algorithm for a class of determinant characteristic equations is given, and some special results of it are considered.

Keywords: determinant, quadratic form, eigenvalue

text:……

References: [1] Li.K.P, Geometric-aspect-of..., J.Math.Appl, 2005, 301:512-523

[2] Bach.A.T, Inequalities-among-..., Studia-Math, 1970, 33:198-211

...

The paper jointly drafted by Shen Qi and Ouye has a neat format and rigorous exposition, basically everything that needs to be written is written.

Ou ** was careful, and all the papers in the Polish mathematics journal "Studia-Math" in 1970 were cited by her.

At that time, under the influence of the big brother of the Soviet Union, mathematics talents in Poland, Romania, Hungary, Yugoslavia, East Germany and other Central and Eastern European countries emerged in large numbers. The papers written by them are still relevant today in the 21st century.

"There are a few minor changes that need to be made, and I can't explain clearly on WeChat. Come learn from the cafeteria." Shen Qi replied to Ouye's message.

Not long after, Ouye came to Xueyi cafeteria with his laptop, found Shen Qi, and sat beside him.

Looking at the steamed buns on the table, Ouye's notebook has no place to put it: "Matrix?"

"Can you understand the meaning of this matrix?" Shen Qi asked.

Ouye shook his head: "It's too difficult."

Shen Qi put the steamed buns on the dinner plate and asked Ouye to put the laptop on the dining table.

"Ouye, you can write papers faster than me." Shen Qi was a little surprised, "Last year at this time of the Golden Autumn Camp, you introduced yourself when we met for the first time, my name is Ouye, and Ou is Ola's Ou, Ye is Fourier's Ye. Your name is wonderful, Euler is your brother, right? The most powerful feature of your Ou family is that you can write papers and slip away."

"You built the frame, so it's fast." Ouye said.

"Let's stop bragging about business, let's talk about this paper we jointly signed. In fact, most of the work was done by you, and I was just checking." Shen Qi operated Ouye's laptop, pointing at the The LaTeX document on the screen said: "Here, the classification of quadratic curves and quadric surface bundles needs to be considered, and the determinant (11) needs to be changed."

"Hmm." Ouye understood in seconds.

"Also here, the greatest common factor of the i-order sub-formula is generally not expressed in this way, please change it."

"The complete set of invariants?"

"Yes, the amount of changes is not large, just the revision of partial expressions."

"oh."

"I won't check the calculation part. I don't have time to do the calculation again. I believe in your calculation ability." Shen Qi has a deeper understanding of Ouye's academic characteristics. As long as Ouye understands his logic, Ouye will A whole paper can be produced quickly, and the coincidence rate is above 95%.

"Where to vote?" Ouye asked.

Shen Qi said: "You find a core journal to submit to, except for the top four in China. It's not a big problem that the paper is signed with my name. After all, I am the one who published the paper. If this paper passes, you will also become People with academic capital."

"Okay." Ouye nodded, and asked again: "Are you in a bad mood?"

Shen Qi said with a tired face: "As for the 23rd question, I encountered a lot of confusion in writing the thesis. My logic didn't work, and I was inconsistent. I stayed up for a few nights and felt tired."

"Take your time." Ouye said, she closed the notebook: "Staying up all night continuously is not advisable."

"You think I want to stay up all night..." Shen Qi smiled wryly, and in an instant, yes, in that instant, he suddenly got a fleeting inspiration: "Ouye, what did you say? Say it again?"

Ouye: "I... I didn't say anything."

Shen Qi's face was full of red, and he stared at Ouye's eyes brightly: "Back, back, the last sentence you just said."

"It's not advisable to stay up all night?" Ouye was a little worried, did Shen Qi go crazy?

Shen Qi grabbed Ouye's upper arm with both hands, and shook it excitedly: "Ouye, you mean, continuous and non-differentiable... No, it should be discontinuous and differentiable?"

Ouye's shaken eyes sparkled: "No, I didn't say that."

"Yes, what you said is very reasonable. Although the common property of Φ is that H is discontinuous and differentiable, Φ is continuous and differentiable on R^n! I thought of it, I finally thought of it, haha! You are very slippery, Ouye , 666!" Shen Qi yelled, and then ran away in a hurry. He was going back to finish his thesis, and the core logic appeared, which started by accident and became inevitable.

"Shen Qi...you..." Ouye looked at Shen Qi who was running away, and muttered to himself, "Crazy, you are hopelessly crazy."

The couple not far from next door witnessed all this, and they stared wide-eyed.

"This Shen Qi, and this Ouye, what are they doing?" The girl majored in liberal arts, she couldn't understand what problem Shen Qi was yelling to solve, she just thought it was very powerful.

The man in engineering is also a top student, so he can understand a little bit: "I just said, there is no normal person in the college, and they form a team to pretend to be B, and the two are crazy."

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