Omnipotent Data

"Solution of a Class of Linear Stochastic Differential Equations"?

Cheng Nuo clicked on the file sent by Wang Genji and studied it carefully.

The solution to a class of linear random equations has already been learned in the freshman course of the Department of Mathematics.

If Cheng Nuo remembers well, for differential equations, it should be solved by the constant variation method.

This is one of the most commonly used and recognized as a relatively simple method for solving differential equations.

The constant variation method, in simple terms, first seeks the solution of the homogeneous differential equation corresponding to the differential equation, and then the constant variation obtains the displayed solution of the equation.

For example, stochastic differential equation d￡=f(t)￡dt+c(t)db, first rewrite the equation as d￡-f(l)￡dl=c(t)db, which corresponds to homogeneous linear stochastic differential The equation is... Then imitate the appropriate factor method in ordinary differential equations,... Finally, ￡=...

Here comes the point!

In this paper by Wang Genji, in addition to the constant variation method, another method of solving a class of linear random equations is proposed.

Another solution is easier than the constant variation method we have been using all the time.

It can be said that if this solution is really proved to be true and usable, it will definitely produce a small-scale shock in the differential domain.

Not to mention sci's mathematics zone 2 journals, even the top journals in the mathematics zone 1, will definitely value this paper by Wang Genji.

However, a pity.

The journal's review editor pointed out that Wang Genji's paper contained major logical errors.

Whether his solution is really practical is still in between.

Cheng Nuo dragged the mouse and continued to look down.

The simple solution method proposed by Wang Genji is as follows:

In the first step, the solution of the pseudo-homogeneous differential equation is obtained.

The second step is to change the constant of the solution of the pseudo-homogeneous differential equation.

The third part, take it to the original equation to verify the solution.

On the surface, it is indeed simpler than the constant variation method.

The content of the following paper is Wang Genji's formula to demonstrate the feasibility of this solution.

Cheng Nuo glanced roughly.

In general, Wang Genji's paper is very clear.

From proposing a conjecture, to proving the conjecture, to explaining the advantages of this solution compared to the constant variation method.

but……

After a simple scan from beginning to end, Cheng Nuo finally understood why Wang Genji's paper was returned by the sci journal for overhaul.

In the third process formula of the later argumentation stage, there was a serious logical error!

I don't know the true face of Mount Lu, but I am in this mountain!

As the author of this paper, Wang Genji has difficulty finding his own mistakes. On the contrary, it was Cheng Nuo, a bystander, who discovered the problem only after scanning the paper from beginning to end.

On the QQ side, Wang Genji doesn't seem to think Cheng Nuo can find the errors in his paper.

Although he has to admit that Cheng Nuo has a strong talent in mathematics.

But with Cheng Nuo's current knowledge reserves, whether he can understand his thesis is still in between.

Wang Genji yawned and sent a message to Cheng Nuo, "Okay, Cheng Nuo, I'll go to sleep first. For the subject, I will take time to look at your research results tomorrow and start working on my part."

Wang Gen basically planned to turn off the computer and go to sleep, but when he looked up, he found that Cheng Nuo responded with a message, "Senior, wait a minute, I seem to...know where you went wrong."

what? !

Seeing this message, Wang Genji woke up most of his sleep.

Is this...real or fake? !

He had just sent the paper in less than five minutes, and it was too short to look at it from beginning to end. But Cheng Nuo told him that he had found the major logical error mentioned by the reviewing editor of the sci journal.

how is this possible!

Wang Genji typed in anxiously, "What you said is true?"

Cheng Nuo: "Of course."

Wang Genji: "Where did it go wrong?"

Cheng Nuo: "It's not clear on QQ, or we can make an appointment tomorrow with the senior, let's discuss it."

Wang Genji's heart was like scratching his heart at this time, eager to know where the mistakes in his paper appeared now.

This problem has troubled him for two full days.

Not thinking about tea, not thinking about rice. The figure is getting thinner.

But he also knows that academic matters are difficult to say clearly without meeting and talking in person.

Wang Genji: "Okay. Just tomorrow afternoon, I will wait for you in the grove on the west side of the playground."

Cheng Nuo: "Well, see you in the small forest."

In the dormitory, Cheng Nuo read Wang Genji's thesis from start to finish, then climbed into bed and got ready to go to bed.

Suddenly, in the dark night, under the dim lights of the corridor, Cheng Nuo saw Yuan Hua sitting upright suddenly, facing Cheng Nuo's direction, and said with a smile, "Your chrysanthemum is really tight."

Cheng Nuo's hair exploded instantly, subconsciously protecting his chrysanthemum.

I... I wipe! What did Yuan Hua want to do, taking advantage of the moon black wind to take advantage of himself? !

After saying that, Yuan Hua lay down straight again. Soon, the grunt sounded.

Cheng Nuo patted his chest: "It turned out to be a dream!"

He has a feeling of aftermath. Just now, he almost lost his eighteen-year virgin body.

He just lay on the bed, only to hear Yuan Hua talking in sleep again.

"Big Brother, Big Brother, Big Brother, don't kill me~www.readwn.com~ I will give you both guns and guns..."

…………

There were no classes for one or two in the morning. Cheng Nuomi slept until 9 o'clock in the morning, and went to the finance department with Yuan Hua and others.

"Cheng Nuo, what are you doing looking at me with this kind of eyes?" Yuan Hua said inexplicably to Cheng Nuo who was sitting next to him in class.

Cheng Nuo looked weird, "Nothing, nothing."

In the lecture hall, the Sixiu class teacher told the students about the core values ​​of socialism.

To spread the light of Marxism in the world.

The classmates in the audience also looked drowsy. Most of them are busy with other things, and few people listen carefully.

Think about this course, focusing on pure memory. For science and engineering students like Cheng Nuo, I really can't take much interest in listening to lectures in class.

The course preached the legal part about the crime of strong women.

The teacher glanced at the roster and called the name, "Student Cheng Nuo, get up and talk about these kinds of behaviors that do not constitute a crime of strong women."

Cheng Nuo, who was called up to answer the question, looked up at the podium.

On ppt, there are several options.

a, male xxoo female

b, female xxoo male

c, female xxoo female

d, male xxoo male

Cheng Nuo: "..."

This question is really sharp!

"This..." Cheng Nuo hesitated and stood there without giving his own answer.

"Well, you can sit down." Teacher Si Xiu waved, motioned Cheng Nuo to sit down, and then patiently explained to everyone under the podium.

"Of these four types of behaviors, only the first type will cause a strong woman to commit crimes. The remaining three types of behaviors are not within the scope of the sentence for rape, so..."

With that said, Si Xiu gave everyone an expression that everyone knew.