Chapter 379

Chapter 382

five minutes later, Chali came back panting.

"God, I borrowed my classmate's card, you use it first." Chari gasped and handed a book card to Cheng Nuo.

Cheng Nuo took it and said with a smile, "thank you."

"No, no thanks." Chali quickly waved his hand, scratched his head, and said to Cheng Nuo with a smile, "God, let's go in together."

"Go

They went in smoothly, first found an empty table to put down their schoolbags, and then under the guidance of Chali, they went to the mathematics section of the library.

There are ten rows of bookshelves, all of which are closely packed with books related to mathematics. At least, there are more than 100000 books.

It covers almost all branches of mathematics, from easy to difficult books.

Standing in front of the bookshelf, Cheng Nuo is dazzled.

This It's heaven on earth!

Holding back his excitement, he took a deep breath and searched for the books he needed step by step.

In three or four days, he will be back in the office to tackle new projects with Professor Fresnel.

And that new project, Cheng Nuo guess 80% should still belong to the field of geometry.

Of all the branches of mathematics, geometry is not Cheng Nuo's best field. Of course, Cheng Nuo's ability in geometry is more than enough to be professor Fresnel's assistant.

But Cheng Nuo's goal is not so narrow.

Taking advantage of the time, more charging is what Cheng Nuo wants to do.

Modern European geometry

affine differential geometry

Ackermann turning geometry

Cheng Nuo quickly opens the harvest mode, sees the books of interest, and pulls them out directly from the bookshelf.

He didn't expect to be a fat man at one go. When he saw that the books in his hands had been piled high, he stopped harvesting.

On the way back to his desk, Cheng Nuo happened to be attracted by the name of a Book: "the development and recent situation of ABC conjecture".

Just yesterday, I heard a lecture about ABC's conjecture, so as soon as I saw the name, Cheng Nuo subconsciously pulled out the book and put it into his "stack of books".

So when zari came back with two books, he saw that Cheng Nuo was chewing a pile of books half a meter high.

While gnawing, the face also showed a intoxicated incomparable expression.

Chali wiped the sweat that did not exist on his forehead, and murmured in his heart, "the great God is the great God. Even the way of reading in the library is so different!"

After thinking about it, he sat opposite Cheng Nuo, picked up the book and read it.

Even if it is all in English, Cheng Nuo's reading speed is not slower than usual.

A book with more than 100 pages can only last half an hour under Cheng Nuo.

With the passage of time, Cheng Nuo's geometry skill points are constantly soaring.

Geometry is one of the oldest branches of mathematics. From the period of the four ancient civilizations to the present, I am afraid it has a history of more than 3000 years.

With thousands of years of accumulation and development, geometry has become a very advanced subject.

Even Professor Fresnel, who stands at the top of the world's mathematical circle, is afraid to say that he can study this subject thoroughly, let alone Cheng Nuo.

He is like the sponge of the vast sea, absorbing the water of knowledge as much as possible.

Mathematics makes people happy. It's a good saying.

When you are sad, take out a math book and study it carefully. You will forget your sorrow.

In the happy, but also take out a mathematics book, slowly taste, will be more happy!

Cheng Nuo was in such a state. He was in a good mood. After reading three or four books on geometry, he was more happy.

While reading a book, tsari looked up from time to time to observe Cheng Nuo's face.

Seeing Cheng Nuo's increasingly upturned corners of his mouth, Chali's classmates were more confused.

For some time, Cheng Nuo was tired of reading geometry books, so he took the thin book "the development and recent situation of ABC conjecture" in front of him.

ABC conjecture has been widely known before, but its difficulty has never been seriously studied.

But it is generally accepted that ABC conjecture can be ranked as the second echelon in addition to six of the seven millennial conjectures that have not yet been solved.

Even compared with nagotbach's conjecture, the difficulty of single theory is higher.

Now, Cheng wants to really experience it.

Turning to the first page, Cheng Nuo glanced at the table of contents.

Sure enough, all the books about ABC conjecture, Shinichi Ueda, is a hurdle that can't be bypassed. About a third of the book is about Shinichi Ueda.

Compared with the famous members of the family of mathematical conjectures, such as Riemann's conjecture, Goldbach's conjecture, twin prime conjecture, and Fermat's conjecture (which has been proved), ABC's conjecture has a very shallow "qualification", because other conjectures are "senior" over 100 years old.This conjecture was put forward in 1985, and its reputation was not obvious at that time, but it came into the view of mathematicians in the world after the importance of the conjecture was noticed by later generations.

In fact, the content of ABC conjecture is the same as Goldbach's conjecture, which is not difficult for ordinary people to understand:

ABC conjecture is aimed at positive integer arrays (a, B, c) satisfying two simple conditions. The first condition is mutual prime of a and B, and the second condition is a + B = C.

Obviously, a positive integer array that satisfies this condition -- for example (3, 8, 11), (16, 17, 33) ——There are infinitely many. In order to lead to ABC conjecture, take (3, 8, 11) as an example, and do a simple calculation of "three steps":

① multiply a, B, C (the result is 3 × 8 × 11 = 264);

② prime the product (the result is 264 = 23 × 3 × 11);

③ multiply all the different primes in the prime number decomposition (the result is 2 × 3 × 11 = 66).

Now, compare the larger of a, B, C with the result of step 3, and you will find that the latter is greater than the former. If you look for some other examples, you may find the same result.

However, this is not a rule. There are countless counterexamples, such as (3125128), etc., but if the result of ③ is added with a power greater than 1, the number of counterexamples will become limited from infinity.

In short, ABC conjecture is a conjecture that allows the existence of counterexamples.

Therefore, the method of using supercomputing to find counter examples to prove conjecture is not applicable at all.

After reading the title, Cheng Nuo took out a piece of paper and wrote and drew on it for a while.

Half an hour later, he could only sigh, "hard!"

Sure enough, this kind of world-class conjecture is not something sexy can be on.

This conjecture, if really has the material!

No clue, no clue.

Cheng Nuo didn't read about the analysis of several big mathematicians on this conjecture. He tried a wave alone, but found that the whole line was defeated.

He could not find any breakthrough to overcome the conjecture.

What a pain!

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