"Senior, here's how I think of it. ”

"Since the method you proposed to substitute the extrema of the first derivative does not work, then change the verification scheme. ”

"What I'm thinking about is that we're going to divide linear differential equations into four forms. to perform the calculations separately. If all four forms are successfully verified, then the correctness and practicability of this simple solution can be proved. ”

"What four forms?" Wang Genji's eyes revealed curiosity.

Cheng Nuo stretched out his fingers and counted them one by one.

"The first, the constant coefficient Black-Scholes stochastic differential equation: d£=£(udt+σdB). ”

"The second, the Black-Scholes stochastic differential equation with time-varying coefficients: d£=b(t)£dt + σ(t)£dB. ”

"The third is a stochastic differential equation of the form dξt=(aξt+bξt α) dt+cξtdBt. ”

"The Fourth ,......"

After reading Wang Genji's paper last night, although I knew that there were obvious logical errors in Wang Genji's paper, it was difficult to say that the conjecture about the new solution was correct. But Cheng Nuo couldn't resist his curiosity, and based on Wang Genji's thesis, he spent the two meditation classes in the morning to finally delve into a seemingly feasible path.

Discuss the situation in detail, and then summarize the results to arrive at the final solution.

Cheng Nuo continued to explain his train of thought to Wang Genji, "For example, in the first case, its corresponding pseudo-homogeneous differential equation dξt=σξtdBt, so ξt=ceσBt, use constant change, and then use the Ito formula to find the integral ,......"

Since Cheng Nuo does not have a specific time to calculate step by step with a formula, he can only provide an idea.

As for whether this idea is correct or not, I'm sorry, and Cheng Nuo can't guarantee it.

However, this is already the most certain verification direction that Cheng Nuo can think of at present.

After the little episode of the cleaning aunt, the two didn't stay here for long.

After Cheng Nuo told Wang Genji all his ideas, the two said goodbye here.

"Cheng Nuo, the kind of thinking you said, I'll go back and try it right now, if it's really feasible, then this paper can really be rescued in the rescue. Wang Genji already showed an impatient expression on his face, his fists clenched, and his expression was very excited.

In my heart, I have rekindled my high fighting spirit.

"Cheng Nuo, thank you really this time. After a while, I'll treat you to a big meal. Wang Genji's tone was sincere.

If it weren't for Cheng Nuo's help, I'm afraid that if Wang Genji was given another week, he wouldn't have been able to find the errors in the paper.

Not to mention...... A brand new essay idea!

In Wang Genji's opinion, in order to understand his paper, Cheng Nuo probably barely slept all night last night.

With such a huge amount of work, it takes at least seven or eight hours to be enough!

In these years, such an excellent and good student is rare!

Wang Genji's heart was full of emotion.

"No, it's just a gesture. Cheng Nuo smiled and shrugged.

In order to alleviate Wang Genji's sense of guilt, Cheng Nuo deliberately added, "Besides, it doesn't take much time, just two meditation classes in the morning." Oh no, to be exact, it's a lesson and a half. ”

Wang Genji: "......"

Gap!

I wrote my dissertation for more than five months before I finished it.

But Cheng Nuo's side is good, and he can do it directly in one and a half classes.

Although he has his own paper as a reference, Wang Genji knows that in his paper, except for the first third of the content, which is a little valuable, the latter part is all wrong formulas with no reference value.

Can't compare, really can't compare......

Wang Genji now finally understands why Professor Liao transferred Cheng Nuo, who has just entered the first year of university, to their research group.

Mathematical talent, this thing, is not related to age linearly!

"Senior, what's wrong with you, are you uncomfortable?" Cheng Nuo looked at Wang Genji's face a little unnatural.

"It's fine. Wang Genji hadn't recovered from Cheng Nuo's words, and said in a daze, "Then Cheng Nuo, I still have to go back to the dormitory, so I'll leave first."

"Well, goodbye, senior. Cheng Nuo smiled and waved.

............

After the matter was done, Cheng Nuo was relaxed.

Anyway, he's done everything he can. And it is up to him to decide which step Wang Ji can reach.

"The sun in the east, the rain in the west!Brother's sweetheart~~"

Cheng Nuo walked back to the dormitory with his trouser pockets in his hands and humming a song.

Suddenly, Cheng Nuo's face changed abruptly.

It occurred to him that something quite serious had occurred to him.

Wang Genji got a new idea for the paper, and in the following period, he must have put all his energy into writing the SCI paper.

But......

Wang Genji, that guy is also in charge of the second part of the project!

Writing essays in class takes up almost all of your time.

Where can Wang Genji find time to study the topic?

The dissertation will definitely not be completed in ten days and half a month.

Cheng Nuo's research topic is interlocking, without the research results of the second part, Jiang Shuobo and Zhuang Poxiao, even if they have great ability, they can't continue to study!

What the hell am I ......

O iniquity!

Cheng Nuo looked up to the sky and sighed, speechless and crying.

He seemed to be watching the winter vacation, gradually moving away from him.

Deserve it!

Cheng Nuo can't wait to slap himself in the mouth now.

Knowing this, he was so fart to help Wang Genji read papers, find mistakes, and provide new solutions, what was the reason for this?

In order to dig a hole and then jump down again?!

No, Cheng Nuo felt that he couldn't let the tragedy happen!

A wonderful winter break should not be spent on a research project.

After returning to the dormitory, he chatted directly with Wang Genji privately on QQ.

Cheng Nuo: "Senior, are you there?"

It took a few minutes for Wang Genji to reply.

Wang Genji: "Cheng Nuo, I just made a preliminary calculation of the first form you mentioned. Sure enough, the final result of the calculation was exactly the same as the result obtained by the constant variation method. ”

"Hahaha, I knew that with my genius brain came up with an easy solution. How could it be wrong! I made a mistake in the last verification, but this time I used the correct verification steps, and I must prove the feasibility of this solution!"

Wang Genji looked very excited.

Cheng Nuo: "What's that, senior, can I discuss something for you?"

Wang Genji: "What's the matter, say?"

Cheng Nuo: "Senior, are you busy revising your thesis right now? I think that the subject may take up too much of your time. ”

"So I think, senior, the task of the second part of your subject will be directly handed over to the three of us, so you don't have to worry about it. Just concentrate on writing your essay. ”

Wang Genji: "Cheng Nuo, who do you think of my Wang Genji?!"

？？？

Cheng Nuomeng paused.

I saw Wang Genji continue to type, "Give the second part of the work to the three of you, and then I won't do anything, and write my name when the project is completed." Take an honor for nothing. Isn't this an empty glove white wolf?!Do you think my king's foundation is such a person who doesn't want to force his face?"

Cheng Nuo: "Senior, I'm just ......"

Wang Genji: "Okay, Cheng Nuo, don't talk about it." Anyway, I will never agree to this. ”

"Time is really tight, but at most, I won't go back during the winter vacation. It's not like I haven't been able to go back before, to be honest, I'm used to it, don't worry about me, really. ”

What the hell am I ......

Cheng Nuo almost vomited out a mouthful of old blood.

Dude, you're used to it.

But what about me?!

I'm still a newcomer who has just entered college for less than a month!

Do you have to accept the cruel fact that you can't go home during the winter break?