"A Class of Linear Random Differential Equations"?

Cheng Nuo clicked on the document sent by Wang Jiji and studied it carefully.

I learned how to solve a class of linear random equations in my freshman year of mathematics.

If Cheng Nuo remembers correctly, for differential equations, it should be solved using the constant change method.

This is one of the most commonly used and widely recognized methods for solving differential equations.

In simple terms, the constant change method first finds the solution of the homogeneous differential equation corresponding to the differential equation, and then the constant change easily obtains the display solution of the equation.

For example, for the stochastic differential equation d£=F(t)£dt+C(t)dB, the equation is first rewritten as d£-F(l)£dl=C(t)dB, and its corresponding homogeneous linear stochastic differential equation is ...... The appropriate factor method in the ordinary differential equation is then followed,...... Eventually, £=...... （“”ω“”)(●′-`●)。

(I really can't make it!)

Here's the point!

In addition to the constant change method, Wang Genji's paper proposes another type of solution method for linear random equations.

Another solution is simpler than the constant change method that we have been using all along.

It can be said that if this solution is indeed proven to be real, it will definitely produce a small shock in the field of differentiation.

Not to mention SCI's mathematics region 2 journal, even the top mathematics region 1 journal will definitely attach importance to Wang Genji's paper.

Still, alas.

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

Whether his solution can really be practical is still between the two.

Cheng Nuo dragged the mouse and continued to look down.

The simple solution proposed by Wang Genji is as follows:

The first step is to obtain the solution of the pseudohomogeneous differential equation.

In the second step, the constant of the solution of the pseudohomogeneous differential equation is changed.

The third part is to bring the original equation to verify the solution.

On the face of it, it is indeed simpler than the constant change method.

In the following paper, Wang Genji uses a formula to demonstrate the feasibility of this solution.

Cheng Nuo glanced at it roughly.

In general, the idea of this paper by Wang Gengen is very clear.

From proposing a conjecture, to proving a conjecture, to illustrating the advantages of this solution over the constant change method.

But......

After simply scanning it from beginning to end, Cheng Nuo finally understood why Wang Genji's paper was sent back by the SCI journal for overhaul.

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

I don't know the true face of Lushan, only because I am in this mountain!

As the author of this paper, it is difficult for Wang Gengen to find his own mistakes. On the contrary, it was Cheng Nuo, a bystander, who found the problem after just scanning the paper from beginning to end.

On QQ's side, Wang Genji didn't seem to think that Cheng Nuo would be able to find the errors in his paper.

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

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

Wang Genji yawned and sent a message to Cheng Nuo, "Okay, Cheng Nuo, I'll go to bed first." As for the topic, I'll take the time to look at your research results tomorrow and start working on my part. ”

Wang Genji was going to close the computer and sleep, but when he looked up, he found that Cheng Nuo had replied to him with a message, "Senior, wait a minute, I seem to be ...... Know where you went wrong. ”

What the?!

Seeing this information, Wang Genji woke up most of the time directly from sleep.

This is...... Really?!

He had just sent the paper in less than five minutes, and a cursory look from beginning to end was considered a very tight time. But Cheng Nuo told him to find the major logical error mentioned by the SCI journal review editor.

How can it be!

Wang Genji typed impatiently, "What you said is true?"

Cheng Nuo: "Of course. ”

Wang Genji: "What went wrong?"

Cheng Nuo: "It's not clear on QQ, senior, or let's make an appointment tomorrow, let's discuss." ”

Wang Genji's heart was like a hundred claws scratching his heart at this time, and he desperately wanted to know where the mistakes in his paper appeared now.

This question has been bothering him for two whole days.

I don't think about tea, I don't want to eat. The body is getting thinner and thinner.

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

Wang Genji: "Okay." I'll be waiting for you tomorrow afternoon, in the grove on the other side of the West Playground. ”

Cheng Nuo: "Well, see you in the grove." ”

In the dormitory, after Cheng Nuo finished reading Wang Genji's paper from beginning to end, he climbed into bed and prepared to sleep.

Suddenly, in the dark night, under the dim light of the corridor, Cheng Nuo saw Yuan Hua suddenly sit up straight, facing Cheng Nuo's direction, and said with a smile, "Your chrysanthemums are so tight." ”

Cheng Nuo's hair stood up in an instant, and he subconsciously protected his chrysanthemum.

I...... What do you want to do Yuan Hua, take advantage of the dark moon and the wind to raise your anus?!

After Yuan Hua finished saying that, he smashed his mouth and lay down straight. Soon, a snoring sounded.

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

He had a feeling of the aftermath of his life. Just now, he almost lost his eighteen years of virginity.

He was just lying on the bed, only to hear Yuan Hua talking in his dreams again.

"Big brother, big brother, big brother, don't kill me. ”

"I'll give you all the guns ......"

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

There were no classes in the morning, Cheng Nuomei slept until more than nine o'clock in the morning, and went to the finance department with Yuan Hua and them.

"Cheng Nuo, why do you keep looking at me with such eyes?" In class, Yuan Hua said to Cheng Nuo who was sitting next to him with an inexplicable face.

Cheng Nuo's face was strange, "It's nothing, it's nothing." ”

In the lecture hall, the teacher of the meditation course told the students about the core values of socialism.

It is necessary to spread the light of Marxism to the world.

The classmates in the audience also looked drowsy. Most of them were busy with other things, and there were very few people who listened carefully.

Meditation is a course that focuses on pure memorization. For science and engineering students like Cheng Nuo, he really can't arouse much interest in listening honestly in class.

The course talks about the legal part, about the crime of strong women.

The teacher glanced at the roster and said, "Cheng Nuo, you get up and talk about these kinds of behaviors that do not constitute the crime of forcing women." ”

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

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 acute!

"This ......" Cheng Nuo hesitated, stood there and did not give his own answer.

"Okay, sit down. Teacher Sixiu waved his hand, motioned for Cheng Nuo to sit down, and then patiently explained to everyone in the podium.

Of these four acts, only the first one will cause a strong woman to commit a crime. The remaining three types of acts do not fall within the scope of the sentence for rape, so ......"

As he spoke, Si Xiu gave everyone an expression that everyone understood.