Although Lu Zhou does not know about economics, in a place like Princeton, any discipline that has something to do with mathematics will have something to do with people who study mathematics to a greater or lesser extent.

Especially economics.

Either a new social relations of production will be born or the scope of human civilization will be further expanded, otherwise it will be difficult to create novel theories through traditional theoretical research methods.

Therefore, mathematics can be said to be the only way for modern economists to make outstanding research results. Although this situation has been criticized by traditional economists as a numbers game, it has certainly helped the industry solve the problem of countless doctoral graduates and employment.

In fact, after so many years of wild growth in the field of theory, mathematics is a bottomless mine for any computational science, and whether or not to dig out something valuable from it depends on how scholars in other fields use and improve the mathematical tools that have been tempered from countless problems, and integrate them into their own disciplines.

Therefore, although Lu Zhou is not particularly interested in economics, whenever he appears in the café on the first floor of the Institute for Advanced Study in Princeton at 3 p.m., occasionally a professor engaged in economic research will take the initiative to talk to him and discuss some mathematical problems that are not so difficult.

After staying in Princeton for so many years, Lu Zhou has dealt with economics bulls that he can't count on two hands.

Not to mention those bigwigs who have won the Nobel Prize, and even the editors of the top journals of "Nature" and "Science" have a close relationship with him.

But anyone with a normal IQ would not risk offending such a big guy to card a master's student's graduation certificate and degree certificate......

As for why Lu Zhou had to be the corresponding author......

It's not that he cares about the corresponding author of a paper, it's just that he doesn't want Xiaotong's mentor to take advantage of him.

Although he was still a little worried, but seeing that the almighty brother said so, Xiaotong no longer insisted, and after asking about the situation of his parents and whether he was doing recently, he reluctantly hung up the phone under the urging of Lu Zhou, who was so hungry.

After closing the laptop, Lu Zhou, who stretched out, took out his mobile phone and ordered a takeout, and then clicked on Xiaotong's unfinished paper and read it line by line.

"Let me see...... Seems interesting? ”

Although he didn't know much about the Bewley model, the part of mathematics involved in it was no different from a primary school student's math homework.

After all, no matter how complex a model is, it can't be more complex and chaotic than a system with plasma turbulence. And even the NS equation and the plasma turbulence model, two world-class problems, can be solved, and a Bewley model is not even qualified to lift his shoes.

If he thinks he is second in his understanding of functional analysis, then no one can call him first.

However, it is also helpful to think about some simple questions once in a while.

Anyway, the takeaway hasn't been delivered yet, and it's idle to be idle, so it's time to relax.

Holding the ballpoint pen in his right hand and putting his left hand on the keyboard, he quickly went through the information in the attachment, and the tip of the pen pinched on Lu Zhou's fingertips was like a flying wheel, running over a series of smooth and neat traces from the paper.

"It's a little simpler, but it's a really interesting math problem...... Who talked to me when I was in Princeton? I don't remember exactly. ”

“…… Why use the Lagrangian multiplier method to solve each step in the optimization process? When a certain piece was calculated, the tip of the pen in Lu Zhoushu's book paused slightly for a few seconds.

However, it was only for a few seconds.

"You can use the endogenous grid method......" muttered to himself, Lu Zhou crossed out the previous line of steps and wrote a new line of calculations.

"The endogenous grid method is also a bit troublesome, and directly optimizing the original mathematical model can save at least 20% of the tedious operations...... Maybe 25 percent. ”

This kind of problem is really not even a problem.

The gushing inspiration broke down the walls that stood in front of the finish line in an instant.

Writing down the last line of the equation, Lu Zhou leaned back in his office chair, slightly lowered the screen of his notebook, and pointed the front camera at a few pieces of scratch paper for himself.

"Xiao Ai, help me tidy it up."

"By the way, refer to the Bewley model and compile a new algorithm for my new model."

Xiao Ai: [Received~ Give it to Xiao Ai! ] (?? ▽?) 】

Almost as fast as Lu Zhou's page turning, Xiao Ai, who completed the scanning of the calculation steps in the shortest time, quickly sorted out the entire mathematical model, and marked out possible problems or clerical errors, and presented them in front of Lu Zhou.

Lu Zhou simply glanced at it, and after confirming that there was no problem with the labeled area, he nodded towards the computer.

Soon the data was uploaded to the quantum computer located under the Jinling Institute for Advanced Study, and almost a few seconds after the data transmission was completed, the feedback data was transmitted from the quantum computer.

Xiao Ai: [The algorithm compilation is complete!] (??????)?? 】

Xiao Ai: [Through the comparative test of 12777 sets of random parameters, the numerical calculation results of the improved mathematical model are basically consistent with the original model, the dispersion is reduced by 13%, and the computing efficiency is increased by 21%.] (^?^*)】

He didn't know exactly what the dispersion of the calculations meant, but the 21% increase in efficiency was basically in line with his expectations.

In other words, using a quantum computer to calculate a master's thesis, will it feel like hitting flies with a cannon?

Forget it, no matter.

Who wants him to have only such a sister?

What's more, the electricity bill in Sioux Province is not worth much now......

Thinking of this, Lu Zhou looked at the computer and continued to order.

"Edit an email for me, package the algorithm and the mathematical model and send it over."

Xiao Ai: [Good master! (??????)?? 】

Seeing the emojis behind this string of bubbles, Lu Zhou suddenly remembered something, and then said, "By the way, remember not to stuff your emojis and emojis in the email, just send the email out normally." ”

Xiao Ai: [Σ(っ°Д°; )っ】

Lu Zhou: "......?" ”

Although he didn't quite understand what Xiao Ai's expression was trying to express, Lu Zhou didn't want to destroy his image as a tall, handsome, intelligent and reliable brother in his sister's mind because of a few emojis or off-line emojis.

It took about five minutes for the email to be sent.

His mailbox received a reply from Xiaotong.

Although the content of the email is very short, even as short as only three characters......

【？？？ 】

Seeing these three question marks, the corners of Lu Zhou's mouth hooked up a smug smile.

Thinking about it, Xiaotong didn't expect that it only took him an hour to solve such a "difficult" problem.

"Speaking of which, it's been an hour, why hasn't the takeout I ordered yet arrived."

Rubbing his stomach, Lu Zhou took out his mobile phone and was about to make a call to the delivery person, but found that his takeaway had been signed for twenty minutes ago.

it?

Who picked up my takeaway?

He was so engrossed in solving the problem just now that he didn't even notice the reminder on his phone.

Just when Lu Zhouzheng was confused, there were three knocks at the door of the office, and then he saw Wang Peng, who was carrying a packing box, walk in.

"Your yellow braised chicken rice," Wang Peng sighed and said, putting the plastic bag containing the packing box on the table, "Shall we discuss?" I'll buy you whatever you want to eat, and can we stop ordering takeout in the future, which purely increases the difficulty of our work. ”

"It's easy to finish things when you're hungry," Lu Zhou smiled embarrassedly as he reached out and took out the packing box from the plastic bag, "...... Speaking of which, how did you send it? ”

Wang Peng: "It's safer for me to send it." ”

Lu Zhou: "Does this mean that my security level has been raised again?" ”

Wang Peng hesitated and nodded.

"Hmm."

There is nothing to hide from this kind of thing in itself.

Just like when the research on controlled fusion entered a critical stage, the local military region directly transferred a company to be responsible for the security of his place of residence, until the Pangu fusion reactor was connected to the power grid and adjusted to a normal level.

Although it is not as exaggerated as when the controlled fusion research was at the beginning, and the international form is not as severe as it was at the beginning, carbon-based chips are related to the future of the domestic semiconductor industry after all, and it is not wrong to be careful.

Hearing this "um", Lu Zhou's hand that broke off the chopsticks suddenly stopped, and he glanced at Wang Peng silently.

Just when Wang Peng was a little inexplicable by this look, Lu Zhou coughed lightly and said.

“…… You didn't do that...... Taste something like that, right? ”

It's not about cleanliness or anything, or maybe it's a bit of a cleanliness fetish......

Unless it is eaten at the dinner table, it doesn't matter, and other foods that others have touched, whether psychologically or physically, he can't taste it.

"How is that possible?!" Choked by Lu Zhou's words, Wang Peng coughed twice before he eased up, "What age is this, how can there be such a thing as a drug test." But you don't have to worry about hygiene, Dr. Yan has done a simple laboratory test, and there is definitely no problem in hygiene. ”

Lu Zhou: "......"

MMP！

It turned out that I took my takeaway and went for a laboratory test, and I said why is it so slow!

made him almost throw a bad review on his backhand.

It's just that as soon as he heard Wang Peng's explanation, Lu Zhou suddenly became even more entangled.

Before sending it over, it actually passed through Dr. Yan's hand......

This guy has a criminal record......

Lu Zhou still remembers that this thing secretly drank his Coke a year ago.

No, it should be said that Ming Qiang drank it in the past.

As soon as I thought of this, I couldn't help but fall into deep thought when I looked at Lu Zhou, who was taking out.

To eat or not to eat?

It's really tangled......