Omnipotent Data

It turned out to be a joint signature? !

Cheng Nuo froze for a moment.

Then he asked, "Senior, why did you write my name?"

Wang Genji: "Hahaha, Brother Cheng Nuo, aren't you very touched now?"

"You don't have to thank me too much, senior. To be honest, if it weren't for your guidance, it would be very difficult for me to publish this paper successfully."

"This joint signature is my reward for you."

There is still a big difference between a single-signed SCI and a jointly-signed SCI in the final evaluation.

Wang Genji was willing to write Cheng Nuo's name on it, and he really meant to thank him.

By the way, let Cheng Nuo remember his friendship. Feel the love from him as a senior!

After all, that is an opportunity to sign a sci paper included in a journal with an impact factor of 2.333. It has a great effect on the evaluation of various awards such as scholarships.

After waiting for a long time, looking forward to it for a long time, Wang Genji saw Cheng Nuo's reply to him.

Cheng Nuo: "Actually...senior, you should be the only one who signed this paper."

"If I want a chance to sign an SCI paper, I can just write one, and I don't need to bother you."

Just... just write an article?

Wang Genji was a little confused.

What does his elementary school boy think of sci journals?

These are not those women who have lost their feet on the street, and they can get on for money!

That represents the world's top paper evaluation standard!

Especially in Huaxia, at the undergraduate level, it is a great honor to have a paper included in SCI.

Wang Genji felt that it was necessary to talk carefully with Cheng Nuo, "Cheng Nuo, SCI papers are not written casually."

"It's not that you don't know my experience. It took two years and seven or eight minor revisions before the first paper was included in SCI. Last time, this paper was directly sent back by the review editor for overhaul. You, my next sci, can only wait until my senior year."

"As for you, there is already a sci paper signed by you. If you work steadily, you can produce a sci paper at the end of the sophomore semester, and you should be able to graduate."

Cheng Nuo smiled wryly, "Senior, I'm telling the truth."

"Why don't you help me look at this."

With that said, Cheng Nuo sent a file on the computer to Wang Genji via QQ.

"What is this?" Wang Genji asked.

Cheng Nuo said casually, "A paper."

"I just finished writing today, and I'm going to submit to SCI journals to test the waters. By the way, senior, do you have any foreign SCI journals you recommend?"

"Senior, are you still there?"

Wang Genji: "Wait a minute, I'll finish reading your paper first."

a dissertation? Contribute to sci?

On Wang Genji's side, with a strange and inexplicable expression, he clicked on the document sent by Cheng Nuo.

Cheng Nuo's thesis title: "Application of Taylor's Formula in Determining the Convergence and Divergence of Alternate Series".

Taylor's formula belongs to the content of advanced mathematics courses.

Alternating series belongs to the content of mathematical analysis course.

Alternating series is a very important series form, but the convergence method is very limited.

In university textbooks, only the Leibniz discriminant method is introduced. Moreover, the application conditions of Leibniz's discriminant method are relatively strict, especially for complex general terms, the monotonically decreasing condition is neither easy to judge nor guaranteed.

Coincidentally, that afternoon, Cheng Nuo had just asked Professor Lu a question related to Taylor's formula. So when he heard the math teacher from the Department of Mathematics talk about the knowledge point of interleaved series, it was like a flash of inspiration, and an idea popped up in Cheng Nuo's mind:

Is it possible to introduce the Taylor formula into the judgment of the convergence of the alternating series, expand the general term of the alternating series, and then judge the convergence one by one?

As soon as this thought popped into Cheng Nuo's mind, he couldn't get rid of it.

Simply, Cheng Nuo took out the scratch paper in class and calculated.

After two classes, Cheng Nuo roughly knew that his thinking should be right.

Taylor's formula, which is a formula with a wide range of applications, is also applicable to judging the convergence of alternating series.

The rest is easy.

It took more than a week, and Cheng Nuo took advantage of the salty fish's time to fill in and complete the thesis.

…………

The camera returns to Wang Genji's side again.

When he saw the title of Cheng Nuo's thesis, he was puzzled for a moment.

Taylor's formula used to determine the convergence of alternating series?

This is the first time Wang Genji has heard that he can do this.

With a skeptical attitude, Wang Genji continued to look down.

The following is the text of Cheng Nuo's paper.

"According to Taylor's formula: f(x)=f(0)+f'(0)x+f''(￡)/2*x^2, among them, ￡ is between 0 and x, so f(- 1^n/n)=……”

In the paper, by applying Taylor's formula, two theorems about judging the convergence of alternating series are given.

Theorem 1: Suppose f(x) has a second-order continuous derivative in a certain field at x=0, and f(0)=0, then ∑【∞, n=1】f(-1^n/n) converges .

Theorem 2: Let f(x) be in [-1, 1]...

For each theorem, Cheng Nuo gave another example to prove it.

It can be said to be very detailed.

It took half an hour, a full half an hour, before Wang Genji finally finished reading Cheng Nuo's paper.

"call!"

Wang Genji took a deep breath and stared blankly at the computer screen, not knowing how to describe his current mood.

Cheng Nuo's "Application of Taylor's Formula in Determining the Convergence and Divergence of Alternate Series", he read it from beginning to end without saying a word.

It can be said... perfect!

Perfect and impeccable.

In terms of the content of the argument, there is not a single letter of error to be found.

From the perspective of Wang Genji, an outsider, if this paper is submitted to SCI, there is more than 80% chance that it will be included in SCI journals.

Without him, the application value of Cheng Nuo's paper is too high.

Using Taylor's formula to determine the convergence of alternating series is not only simple, but also gets rid of the limitation of Leibniz's determination method, so that there is a common and practical method for judging the convergence of alternating series.

Wang Genji couldn't find any reason, and some SCI journals would reject this paper.

Wang Genji typed and asked, "Cheng Nuo, did you really write this paper?"

Cheng Nuo: "Of course I wrote it. Among the people I know, besides you, who is your senior, who can write an SCI alone?"

"Hahaha, you're right." Facing Cheng Nuo's flattery, Wang Genji accepted it without shame.

"By the way, how long have you been writing this paper? It's only been less than two months since school started. You won't start preparing during the summer vacation, right?" Wang Genji asked with a smile.

"Summer vacation?" Cheng Nuo was stunned for a moment, and said lightly, "No, it took the last ten days, less than an hour a day, to get it out."

Ten days, less than an hour a day?

Wang Genji was a little suspicious of life.

When can a sci paper be produced in less than ten hours?

Could it be that the times are developing so fast that I can't keep up?

Suddenly, Wang Genji remembered another thing.

"Cheng Nuo, I have something to do here, so I won't tell you more."

"What's the matter, so anxious? You haven't recommended me which journal to select for?"

"For this, you just look for those with high impact factors in the second district to submit, and they will not reject the manuscript."

After saying this, Wang Genji hurriedly went offline.

Later, he even edited an email and sent it to Davis, the review editor of "Applied Mathematics Letter".

why?

Of course, it was to see if Cheng Nuo's name could be deleted from his paper.

That guy Cheng Nuo has the potential to write an SCI article in ten days. His signature on this paper is still missing.

Then his joint signature can only dig a hole for himself.

………………………