Inadvisable (Extra Chapter for Moe Lord, courtesy of Just the Right Illusion)

At this moment, Shen Qi entered a state of complete absorption.

He ignored everything except mathematics.

Students coming and going, an auntie clearing away dishes, and a couple showing affection not far away.

Air, it's all air.

It's all an illusion.

What then is reality?

The fact that this paper was completed is the most authentic truth.

"Everyone says the Chinese academic world is chaotic, but I don't think so. This eccentric guy from the math department is a breath of fresh air in academia. I don't know what he's thinking about, but I bet it's related to mathematics. These days, it's rare to be able to reach such a meditative state when thinking about mathematical problems." The girl couldn't help but speak up, chatting with her engineering boyfriend across from her.

"Qingliu? He's the most dangerous mudslide in the entire Yanda University. I've never seen such a pretentious freshman." The engineering student was so annoyed. Shen Qi, you're like a ghost that won't leave me alone. I see you everywhere. You beat me in the running, you flirt with my sister at dinner, and you're just trying to act cool. It's outrageous!

"Hey, you're only a sophomore, okay? How many freshmen have you ever met?" the girl said with a smile, skillfully peeling a mantis shrimp and placing it on her boyfriend's plate.

"Let's go see a movie." The engineering student didn't want to stay here a second longer.

"We haven't finished eating the mantis shrimp yet. Finish it before you leave, and don't waste any!" The girl continued peeling the mantis shrimp.

Faced with the logical problem of the generalized Jacobian matrix algorithm for semi-smooth equation systems, Shen Qi was on the verge of collapse, completely at a loss for ideas.

The problem is that having too many conflicting ideas leads to a lack of effective solutions.

Shen Qi's phone vibrated. He took it out and saw a WeChat message from Ou Ye: "<Algorithm for a Class of Determinant Characteristic Equations> is complete. Do you want to modify it?"

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

Shen Qi was inexplicably spurred on; in less than four days, Ou Ye had already finished a paper?

Shen Qi opened the PDF paper and quickly reviewed it. The paper was titled "An Algorithm for Characteristic Equations of a Class of Determinants," a name he had chosen himself.

All the work other than the thesis title was completed by Ou Ye, based on Shen Qi's thesis outline.

Shen Qi - Ou Ye

Mathematics Department, School of Mathematical Sciences, Yenching University - Beijing - 100000

Abstract: This paper presents an algorithm for the characteristic equation of a class of determinants by utilizing the inertia of quadratic forms with variables, and considers some special results.

Keywords: determinant, quadratic form, eigenvalue

Text:...

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

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

The paper, jointly drafted by Shen Qi and Ou Ye, is well-formatted and rigorously argued, covering almost everything that needed to be written.

O. S. was very meticulous; she even cited a paper published in the Poland mathematics journal <Studia-Math> in 1970.

In that era, under the influence of the Soviet Union the Boss, many mathematical talents emerged from Central and Eastern European countries such as Poland, Romania, Hungary, Yugoslavia, and East Germany. Their papers are still relevant today in the 21st century.

"There are a few minor changes that need to be made, but it's hard to explain over WeChat. Come to the cafeteria at No. 1." Shen Qi replied to Ou Ye.

Not long after, Ou Ye arrived at the No. 1 student cafeteria with her laptop, found Shen Qi, and sat down next to him.

Looking at the table full of steamed buns, Ou Ye didn't even have room to put her notebook. "Matrix?"

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

Ou Ye shook her head. "Too difficult."

Shen Qi tidied up the steamed buns and put them on a plate, then asked Ou Ye to place the laptop on the dining table.

"Ou Ye, you write papers faster than I do." Shen Qi was somewhat surprised. "At this time last year at the Golden Autumn Camp, when we first met, you introduced yourself as Ou Ye. Ou is the Ou from Euler, and Ye is the Ye from Fourier. What a clever name you chose! Euler must be your brother, right? The most impressive characteristic of your Ou family is that you write papers like lightning."

"You built the framework, so it was fast," Ou Ye said.

"Let's stop with the mutual flattery and talk about this paper we co-authored. Actually, you did most of the work; I just checked it out." Shen Qi operated Ou Ye's laptop, pointing to the LaTeX document on the screen, and said, "Here, we need to consider the classification of quadratic curves and quadratic surface bundles, and the determinant (11) needs to be modified."

"Hmm." Ou Ye understood instantly.

"Also, here, the greatest common divisor of the i-th order minors is not usually expressed this way, let's change it."

"The complete set of invariants?"

"Yes, the changes are minor, just revisions to some wording."

"Oh."

"I won't check the calculations; there's no time to do it again. I trust your calculation abilities." Shen Qi had gained a deeper understanding of Ou Ye's academic characteristics. As long as Ou Ye his logic, he could quickly produce a paper with a compliance rate of over 95%.

"Where should we throw it?" Ou Ye asked.

Shen Qi said, "You should submit to a core journal, excluding the top four in China. Having my name on the paper shouldn't be a problem, after all, I've published papers before. If this paper gets accepted, you'll also have academic capital."

"Okay." Ou Ye nodded, then asked, "Are you not feeling well?"

Shen Qi said, looking exhausted, "I encountered a lot of trouble with question 23 in my paper. My logic wasn't working, and my answers were contradictory. I stayed up for several nights in a row, and I'm mentally exhausted."

"Take it slow," Ou Ye said, closing her notebook. "Staying up all night for several nights in a row is not advisable."

"You think I want to stay up all night..." Shen Qi gave a wry smile, and in that instant, yes, just a fleeting moment, he suddenly had a flash of inspiration. "Ou Ye, what did you say? Say it again?"

Ou Ye: "I... I didn't say anything."

Shen Qi, his face flushed, stared intently into Ou Ye's eyes, his gaze shining. "Backtrack, backtrack, the last thing you said."

"Staying up all night for consecutive nights is not advisable?" Ou Ye was a little worried. Had Shen Qi gone mad with qi deviation?

Shen Qi grabbed Ou Ye's upper arms with both hands and shook them excitedly. "Ou Ye, you mean, continuous non-differentiable... no, it should be discontinuous differentiable?"

Ou Ye's eyes sparkled as she was shaken. "No, I didn't say that."

"That's right, what you said makes a lot of sense. Although the common property of Φ is that H-non-differentiable, Φ is continuously differentiable on R^n! I've got it, I've finally figured it out, haha! Ou Ye, you're awesome, 666!" Shen Qi shouted, then ran off in a flash. He had to go back to finish his thesis. The core logic had emerged: it started by chance and ended by necessity.

"Shen Qi ...you..." Ou Ye watched Shen Qi rush away and muttered to herself, "A madman, hopelessly mad."

The couple living nearby witnessed everything, and they stared at each other in disbelief.

"What are Shen Qi and Ou Ye doing?" The girl, who was studying humanities, couldn't understand what problem Shen Qi was shouting about to solve; she just thought he seemed very impressive.

The engineering student was also a top student; he understood some of it. "I told you, there's not a single normal person in the math department. Those two teamed up to show off; they're both lunatics."