universal data

Chapter 250 Sorry!
"Senior, this is how I think."

"Since the method you proposed to use the obtained first-order derivative extreme value substitution does not work, then use another verification method."

"What I think is that we divide the linear differential equation into four forms and perform operations separately. If all four forms are verified successfully, it can prove the correctness and practicability of this simple solution."

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

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

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

"The second type is the time-varying coefficient Black-Scholes stochastic differential equation: d=b(t)dt+σ(t)dB."

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

"The fourth type,..."

After reading Wang Genji's paper last night, although I know that there are obvious logical errors in Wang Genji's paper, it is difficult to say that the conjecture about the new solution is correct.But Cheng Nuo couldn't bear his curiosity. Based on Wang Genji's thesis, he spent the two morning lectures and finally worked out a seemingly feasible path.

Discuss by situation, and then summarize the results to get the final solution.

Cheng Nuo continued to explain his thinking to Wang Genji, "For example, in the first case, it corresponds to the pseudo-homogeneous differential equation dξt=σξtdBt, so ξt=ceσBt, using the constant variation, and then using the Ito formula to calculate the integral,... "

Since Cheng Nuo didn't have specific time to use the formula to calculate step by step, he could only provide an idea.

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

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

After the incident with Mrs. Cleaning, the two of them didn't stay here for long.

After Cheng Nuo explained all his ideas to Wang Genji, the two bid farewell here.

"Cheng Nuo, the idea you mentioned, I will go back and try it right now. If it is really feasible, then this paper can really be rescued." Wang Genji has an impatient expression on his face. , clenched his fists, looking very excited.

In my heart, the high-spirited fighting spirit has been rekindled.

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

If it weren't for Cheng Nuo's help, Wang Genji might not be able to find the errors in the paper even if he gave Wang Genji another week.

Not to mention... a brand new thesis idea!

From Wang Genji's point of view, Cheng Nuo probably didn't sleep all night last night in order to understand his thesis.

With such a huge workload, at least seven or eight hours are enough!

These days, it's rare to see such an outstanding student!

Wang Genji's heart was full of emotion.

"No need, it's just a little effort." Cheng Nuo shrugged with a smile.

In order to alleviate Wang Genji's psychological guilt, Cheng Nuo specially added, "Besides, it doesn't take much time. It's just two meditation classes in the morning. Oh, no, to be precise, it's one and a half classes."

Wang Genji: "..."

The gap!The gap!
My own thesis took more than five months to complete.

But Cheng Nuo's side is good, just take a class and a half to get it done.

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

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

Now Wang Genji finally understood why Professor Liao transferred Cheng Nuo, who was just a freshman, to their research group.

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

"Senior, what's wrong with you, are you feeling unwell?" Cheng Nuo looked at Wang Genji's expression a little unnaturally.

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

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

…………

After the work was done, Cheng Nuo felt relaxed.

Anyway, he has done everything he can do.And which step Wang Genji can reach depends entirely on himself.

"That sun in the east, that rain in the west! That sweetheart of my brother~~"

With both hands in his trouser pockets, Cheng Nuo walked back to the dormitory humming a little tune.

Suddenly, Cheng Nuo's expression changed as he was walking on the road.

He suddenly thought of a rather serious matter.

Wang Genji got a new idea for the thesis, and in the following period of time, he must devote all his energy to writing the SCI thesis.

but……

That guy Wang Genji is still in charge of the second part of the project!

Attending class plus writing papers takes up almost all of my time.

How could Wang Genji spare time to study the subject.

A thesis, without ten days and half a month, is definitely not finished.

The subject Cheng Nuo and the others are researching is interlocking. Without the results of the second part of the research, Jiang Shuobo and Zhuang Poxiao will not be able to continue their research no matter how capable they are!
I'm so...

孽 孽!
Cheng Nuo looked up to the sky and sighed, speechless and crying a thousand lines.

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

Should!You deserve it!

Cheng Nuo wished he could slap himself in the face right now.

If I had known this before, why did he help Wang Genji read papers, find mistakes, and provide new solutions?
In order to dig a hole and then jump into it by yourself? !

No, Cheng Nuo felt that he couldn't let the tragedy happen!
The wonderful winter vacation time must not be spent on research topics.

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

Cheng Nuo: "Senior, are you there?"

A few minutes later, Wang Genji replied.

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

"Hahaha, I knew it, with the simple solution I came up with with my genius brain. How could it be wrong! Last time the verification went wrong, this time I used the correct verification steps, I must prove the feasibility of this solution come out!"

Wang Genji looked very excited.

Cheng Nuo: "What, senior, can I discuss something with you?"

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

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

"So I think, senior, you will hand over the second part of your project directly to the three of us, so you don't have to worry about it. Just concentrate on writing the thesis."

Wang Genji: "Cheng Nuo, who do you think I am, Wang Genji?!"

???

Cheng Nuo was taken aback.

I saw Wang Genji continue typing, "Leave the second part of the work to the three of you, and then I will do nothing, and finally write my name when the project is completed. An honor for nothing. This is not an empty hand. Do you?! Do you think I, Wang Genji, are such a shameless person?"

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

Wang Genji: "Okay, Cheng Nuo, don't talk about it. Anyway, I absolutely can't agree to this matter."

"Time is really tight, but at most it's not going back during the winter vacation. It's not like there were times when I couldn't go back. To be honest, I'm used to it. Don't worry about me, really."

I'm so...

Cheng Nuo almost spat out a mouthful of old blood.

Brother, you are used to it.

But what about me? !

I'm still a freshman who has just entered university for less than a month!

Do you have to accept the cruel fact that you can't go home during the winter vacation?
(End of this chapter)