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Chapter 39: The Glory Goal

Qiao Yu didn't care what the teachers were thinking. Even his eager anticipation for Xiaolibaba's math competition had faded.

Yes, at this time Qiao Yu had already put most of his attention on studying number theory, especially prime numbers and large prime numbers.

Qiao Yu has his own understanding of mathematics.

He has always believed that mathematics is simply a discipline that studies patterns.

Prime number distribution, divisibility, or congruence relationships are all rules. He believes that as long as he can find those potential, undiscovered rules, he can master the method of quickly factoring large prime numbers or even super-large prime numbers.

As long as he mastered this method, all the wealth in the world would be his. It is no exaggeration to say that he could make a fortune just by collecting protection fees.

Yes, Qiao Yu has thought about it. If he can really solve this puzzle, he will set up a company to provide password security services to large companies and institutions in need. If he can really succeed, maybe those richest people who are now affectionately called Dad will have the urge to call him Dad Qiao.

Qiao Yu had no interest in being a father, but he was really interested in money, which led to his unprecedented interest in mathematics, especially numbers.

Yes, not just for prime numbers, but numbers, or more precisely, integers. Qiao Yu believes that if you want to study prime numbers thoroughly, you can't bypass the relationship between prime numbers and other integers.

For example, the quadratic reciprocity law mentioned in the book, the most basic tool in classical number theory, although it mainly describes the quadratic remainder relationship between two odd prime numbers, but in Qiao Yu's view, this law also directly involves the relationship between prime numbers and other integers.

If Lang Jie knew what Qiao Yu was going through at this moment, he would probably be very relieved.

Under his guidance, Qiao Yu actually developed a strong interest in number theory, which was what Langjie wanted to see the most. With Qiao Yu's current talent, it would be a pity not to study number theory.

Of course, there was some surprise. After all, the content of algebra and number theory was still too advanced for Qiao Yu's age.

But no matter what, driven by the desire to become the richest man, Qiao Yu's feelings towards number theory, which he had previously thought was too profound, disappeared, and his confidence quickly expanded to infinity.

If the good guy asked Qiao Yu about his feelings about mathematics at this time, the answer would probably be deep love for it.

……

"Qiao Yu, why have you been so listless these past two days?" Xia Keke stared at Qiao Yu and asked while eating breakfast.

"Have you ever seen the moon at three in the morning?" Qiao Yu replied casually, only to be met with a roll of the eyes.

"Why aren't you sleeping in the middle of the night? What are you doing?"

"Of course it's studying. Studying makes me happy!"

"Studying late at night? What are you studying?"

"Math! You are still young and don't understand how much fun it is to learn real math."

Qiao Yu said this very seriously. Xia Keke, who felt that she knew Qiao Yu very well, could see that this guy was really serious about it, and asked curiously, "What is real mathematics?"

Hearing this question, Qiao Yu quickly sipped the last mouthful of noodles and became more energetic: "For example, you know prime numbers, right?" Xia Keke rolled her eyes again: "Nonsense, I'm in the Rocket Class! I learned prime numbers and composite numbers in the first grade of junior high school."

"Then do you know why there are infinite prime numbers?" Qiao Yu asked nonchalantly.

Xia Keke frowned and thought carefully. After a while, she shook her head and said, "I remember the textbook directly said that there are infinite prime numbers. Is this a theorem?"

Qiao Yu said with a beaming face: "No, no, no, mathematical theorems are only theorems after they have been proven. In fact, the proof is very simple. First, assume that there are a finite number of prime numbers, from P1 to Pn, and then construct a new number N, which is equal to the product of all prime numbers plus 1.

Because we previously assumed that prime numbers are finite, but when N is divided by any prime number Pi, there will be a remainder of 1. This means that the new number N cannot be divided by any prime number. So N is either a new prime number or has a prime factor that is different from all other prime numbers, which proves that there are infinite prime numbers, which is real mathematics. "

Xia Keke curled her lips. Although her grades were indeed good, her math grades were only average. It was hard for her to get the point that made Qiao Yu excited, so she decisively changed the subject: "By the way, how did you do on the test yesterday? They all said the last question in physics was quite difficult."

"Were there difficult questions on yesterday's physics test? Are you in the rocket class?" Qiao Yu, who was still in an excited state, said contemptuously.

"Isn't the last circuit question difficult? Many people got it wrong!" Xia Keke emphasized angrily.

"Circuit? Oh, that's the solution I forgot to record. Compare the two methods to see which one is more energy-efficient? There are only two laws used in total, one is Joule's law and the other is Ohm's law. Can you say it's difficult? It just requires a slight conversion.

So the final answer must be the second one, connecting a heating wire in series at point B. After calculation, the newly connected resistance value should be approximately equal to 18.33 ohms. "

Qiao Yu said with certainty that after all, this was content that they had just finished taking the exam yesterday, so it would be difficult to forget it.

"I did the right thing, but many people did the wrong thing!" Xia Keke emphasized again.

"Oh, you're awesome!" Qiao Yu complimented him against his will, but couldn't help but add, "But if you find these questions difficult, isn't it a bit of a stretch to join Class 1? Why does this rocket class sound unworthy of its name?"

It’s not that he lacks emotional intelligence, but after all, Xia Keke has been his little follower for many years, so Qiao Yu always can’t help but criticize her.

The most important thing is that now he doesn't need to pretend anymore and can show his true colors. These things learned in junior high school are indeed very simple.

"It's so simple, so you can get full marks?" Xia Keke asked.

"There will be no problem with math, physics and chemistry. The teacher will deduct some points for other subjects. After all, it's just a mock exam and the teacher is afraid that I will be too proud. But if your Rocket Class is at this level, it shouldn't be a problem for me to crush you." Qiao Yu said honestly.

Xia Keke sneered: "Haha..."

She believed what Qiao Yu said and was very happy, but seeing Qiao Yu's confident look, she couldn't help but want to hit this guy.

Obviously her attitude had no effect on Qiao Yu at all.

"It's so helpless in many cases. Some people don't know how weak they are unless they work hard. For example, for those students of yours who think the physics test is difficult, I suggest that they should accept their mediocrity as soon as possible, be nicer to themselves, and stop pushing themselves so hard. Life is not worth it."

From these words, we can tell that Qiao Yu is a sincere person.

(End of this chapter)