It turned out to be a joint signature?!

Cheng Nuo was stunned for a moment.

Then he asked, "Senior, why did you put my name on it?"

Wang Genji: "Hahaha, Senior Brother Cheng Nuo, are you very moved now?"

"Don't thank me too much. To be honest, if it weren't for your guidance, it would have been difficult for me to publish this paper. ”

"This joint signature is even my reward for you. ”

There is still a big difference between a single SCI and a joint SCI in the final evaluation.

Wang Gengen is willing to write Cheng Nuo's name, and he does have the meaning of gratitude.

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

After all, it was a chance to be named to a SCI paper 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 and looking forward to it for a long time, Wang Genji saw Cheng Nuo's reply to him.

Cheng Nuo: "Actually...... Senior, the signature of this paper is only written by you. ”

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

As you see fit...... Would it be nice to write one?

Wang Genji's heart was a little messy.

What did his junior brother think of SCI journals?

This is not those women who have lost their footing on the streets, and they can get on it if they give money!

That's the best paper evaluation standard in the world!

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

Wang Genji felt the need to talk carefully to Cheng Nuo and said, "Cheng Nuo, SCI papers are not something that can be written casually. ”

"It's not like you're not unaware of my experience. It took two years and seven or eight minor repairs before the first paper was included in SCI. Last time, this paper was directly sent back by the review editor for overhaul, if it weren't for you, my next SCI would have to wait until my senior year. ”

"As for you, there is now a SCI paper signed by you. If you work steadily, you can get a SCI at the end of your sophomore year, and you should be able to secure your research prospects. ”

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

"Why don't you help me see this. ”

As he spoke, Cheng Nuo sent a document on the computer to Wang Genji through QQ.

"What is this?" asked Wang Genji.

Cheng Nuo said casually, "A paper." ”

"I just finished writing it today, and I'm going to test the water in SCI journals, in other words, senior, do you have any foreign SCI journals that you recommend?"

"Senior, are you still there?"

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

Submit a paper to SCI?

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

Cheng Nuo's dissertation title: "Application of Taylor's Formula in Determining the Convergence of Staggered Series".

Taylor's formula, which is part of the Advanced Mathematics curriculum.

Staggered progression, which is part of the mathematical analysis course.

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

In university textbooks, only the Leibniz method of judgment is introduced. Moreover, the application conditions of Leibniz's discriminant method are relatively strict, especially for complex general terms, and the monotonically decreasing conditions are not easy to judge most and difficult to guarantee.

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

Is it possible to introduce Taylor's formula into the discriminant of the convergence of the staggered series, expand the general term of the interleaved series, and then perform the convergence discriminant one by one?

As soon as this idea popped up in Cheng Nuo's mind, it lingered.

Simply, Cheng Nuo directly took out the scratch paper in class and counted it.

After two classes, Cheng Nuo roughly knew that his thoughts should be correct.

Taylor's formula, which is a very widely used formula, can also be applied to determine the convergence of staggered series.

The rest is simple.

It took more than a week, and Cheng Nuo took advantage of the time of salted fish to add and supplement to complete this paper.

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

The camera returns to Wang Genji again.

After he saw the title of Cheng Nuo's thesis, he was puzzled at first.

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

This is the first time Wang Genji has heard of such a thing.

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

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

"From Taylor's formula has: f(x)=f(0)+f'(0)x+f''(£)/2*x^2, where £ is between 0 and x, so f(-1^n/n)=........."

In this paper, by applying Taylor's formula, two theorems on the convergence determination of interleaved series are given.

Theorem 1: Let f(x) have a second-order continuous derivative in a field at x=0, and f(0)=0, then ∑ [∞,n=1] f(-1^n/n) converge.

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

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

It's very detailed.

Half an hour, it took half an hour for Wang Genji to finally finish reading Cheng Nuo's paper.

"Hoo ——!"

Wang Genji took a deep breath and looked at the computer screen in a daze, not knowing how to describe his mood at this time.

Cheng Nuo's "Application of Taylor's Formula in Determining the Divergence of Staggered Series", he read it word for word from beginning to end.

It can be said that ...... It was perfect!

Impeccably perfect.

In terms of the content of the argument, it is impossible to find a single letter of error.

From the perspective of Wang Genji, an outsider, if this paper is submitted to SCI, there is a chance that more than 80% of this paper 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 staggered series is not only simple, but also gets rid of the restrictiveness of Leibniz's judgment method, so that there is a common and practical method for determining the convergence of staggered series.

Wang Genji can't find any reason why SCI journals will reject this paper.

Wang Genji typed and asked, "Cheng Nuo, is this paper really written by you?"

Cheng Nuo: "Of course I wrote it. Who else in my acquaintance can write a SCI article on his own, except for you, the foundation senior?"

"Hahaha, that's what you said. In the face of Cheng Nuo's praise, 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 the start of school. You're not going to start preparing during the summer vacation, are you?" asked Wang Genji 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 skeptical about life.

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

Could it be that the times are moving too fast for me to keep up?

Suddenly, Wang Genji remembered another thing.

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

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

"You just need to find those with high impact factors in the second district, and they won't reject the manuscript. ”

After saying this, Wang Genji hurriedly went offline.

SUBSEQUENTLY, HE EVEN EDITED AN EMAIL THAT HE SENT TO DAVIS, THE REVIEW EDITOR OF APPLIED MATHEMATICS LETTERS.

Why?

Of course, to see if I can delete Cheng Nuo's name from his paper.

Cheng Nuo, that guy, has the potential to make a SCI in ten days. The signature of his paper is still missing.

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

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