Chapter 113 I am better at physics than mathematics Just as Xu Qingzhou was thinking hard, Xu Zhengyang and others had already arrived in the classroom. After Xu Zhengyang's guidance, Kong Xianbo finally regained some of his former spirit. Yes, we are mathematicians, why should we compete in physics? Isn't it enough to win in mathematics? "Lao Kong, those guys are not from our class, right?" Xu Zhengyang pointed at the two unfamiliar boys in the front. Kong Xianbo took a look, shook his head, and said, "These two people are rebuilt." "Renovation" Xu Zhengyang shuddered, thinking that he had to do it carefully because he couldn't afford to lose face. Moreover, as soon as he entered the classroom, he would be surrounded by a large group of strangers, and an inexplicable fear would arise in his heart. It's that feeling of going to the enemy's base alone and facing a group of strangers with knives and guns. It's so uncomfortable. Jiao Mingwu sat on the podium, looking at the latest issue of the electronic journal "Mathematical Inventions" sent by Gu Zhizhong, about the application of Euler's formula in wave function representation. He nodded slightly, with undisguised admiration in his eyes. Being able to skillfully apply wave functions, calculus and linear algebra must mean that one is very proficient in these things, which is why he was relieved to let Xu Qingzhou skip the lecture. If he can achieve this level in his freshman year, within 10 years, he may have a chance to win the Fields Medal.
"Professor, I see you are in a good mood today." A senior student chatted with Jiao Mingwu with a smile. Jiao Mingwu was in a good mood and nodded: "Yes, a student in our college has published a paper in Mathematical Inventions." "Mathematical inventions? So cool!" "your student?" Nearby, Xu Zhengyang and others also pricked up their ears to listen to the conversation between the senior and Professor Jiao, and were impressed by the senior's strong mentality and how calm he was even after retaking the course. "After all, he is still your junior." Jiao Mingwu looked at the man on the left. “Ah? Junior, you published an SCI paper in your sophomore year?!” the man exclaimed. Kong Xianbo secretly breathed a sigh of relief, clenched his fists, and was full of energy. He published a paper in a top journal in his sophomore year. This was the life he should have. Jiao Mingwu looked around the classroom and said with a smile, "He didn't come to class today." "Didn't come?" The boy was stunned for a moment, then after he came to his senses, he was surprised and said, "The big guy who published SCI can also retake the course." The boy next to him also laughed, thinking that it was normal for him to fail a course and have to retake it. "Humph~ Do you think I'm just like you two, the last two?" Jiao Mingwu glared and said unhappily, "Xu Qingzhou, he's in this class since he was a freshman!" "???" The classroom fell silent. At 5: in the afternoon, Xu Qingzhou came out of the computer room and felt that it was indeed a supercomputer. It was much faster than his computer, and screening number pairs was as easy as drinking water. Only then did I notice that Gu Zhizhong sent a message saying that the paper had been published. Xu Qingzhou was also a little surprised that the two papers were published on the same day. Of course, although it was the same day, the publication dates on the two journals "Physical Reports" and "Mathematical Inventions" were different.
For example, the date of “Mathematical Inventions” is November 2014, 11. Many journals are printed in advance so that when readers receive the November issue in October, they will not feel that it is out of date. Also, the group was bombarded with messages. Of course, the news was mainly about Xu Zhengyang, and Kong Xianbo and Zhai Ziqiang fell into a strange silence. He sent a message all night long, saying, put away your phone, and go eat. When he was eating in the cafeteria of the third school, Ji Yunshi called and said that the procedures for the second major had been completed, and he would usually attend classes with the Physics Class 1. As for whether to attend the class, it depends on whether Xu Qingzhou has time. After dinner, Xu Qingzhou found an empty classroom. The prime number analysis model he had constructed was only a basic model, or the foundation, and he needed to add bricks and tiles to it next. However, when simulating numbers at the supercomputing center in the afternoon, Xu Qingzhou discovered a small problem. When constructing the underlying model, Xu Qingzhou wrote a Python function to better screen prime numbers and find patterns. [#Initialize a Boolean array, all values are set to True, indicating that all numbers may be prime numbers prime =[True for _ in range(limit + 1)] p = 2 while (p * p #If prime[p] is not changed, then it is a prime number if (prime[p]== True): #Update all multiples of p to non-prime numbers] It can be found when running in the supercomputing center. When generating all prime numbers less than or equal to 10000000, . limit = 10000000, this function consumes a lot of memory and computation time. This situation did not occur when I used my own computer to simulate before, but when I used a supercomputer, the problem became more obvious. It feels like a 1050 graphics card appears in a top-of-the-line computer. Xu Qingzhou gently turned the pen in his hand, thinking about how to make some changes. Time passed by minute by minute. At 22:30 in the evening, Xu Qingzhou let out a breath, looked at the screen, and nodded with satisfaction. [primes = ([2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31 #Calculate prime number intervals gaps = (primes) #Calculate mean and standard deviation] An approximate expression for the prime number theorem, which gives an approximate value for the number of prime numbers \pi(x)π(x) less than or equal to some number $ x $: [\pi(x)\approx \frac{x}{\ln x}] This formula is very accurate when $x$ is large. On this basis, we directly use the primerange function, which has the same effect as the previous Python function, but the entire calculation process is much simpler. After stretching, Xu Qingzhou packed his things and returned to the dormitory. When Xu Qingzhou pushed the door open, he found that the atmosphere in the dormitory was very strange. Kong Xianbo was sitting on a chair with lifeless eyes. Zhai Ziqiang looked at him, wanting to say something but stopping himself. Xu Zhengyang was better, but he was also staring at him at this time. Xu Qingzhou put down his things and asked worriedly, "Are you all okay?" "I'm fine, but Lao Kong and the others are devastated." Xu Zhengyang's eyes were filled with resentment. He gritted his teeth and said, "Old Xu, what the hell is going on?" Kong Xianbo and Zhai Ziqiang also looked over, wanting to hear what Xu Qingzhou had to say. "It's just two papers, not a big deal. I was planning to tell you later." Xu Qingzhou smiled modestly.
Just two papers? Not a big deal? Xu Zhengyang was silent. At this moment, he suddenly felt that Lao Kong’s previous pretentious behavior was easy to accept, and even felt friendly. Damn, this guy is the real king of bullying! Kong Xianbo covered his chest, feeling like he was having a myocardial infarction. Zhai Ziqiang let out a breath and gave a thumbs up. "I started conceiving these two articles during the summer vacation, and Professor Gu Zhizhong also helped me revise them." Xu Qingzhou explained with a smile. Professor Gu helped me correct my mistakes? Hearing this, Kong Xianbo finally felt better. If Professor Gu could help him revise it, then... But why didn't Professor Gu sign his name? Not even the corresponding author's name. Before Kong Xianbo asked, Zhai Ziqiang had already discovered the key point: "But Professor Gu teaches mathematics. How can he help you revise your physics paper?" "Oh, this one, I wrote it myself. Professor Gu only helped me revise the math part, but because the changes were minor, he said he would not sign his name." "Actually, I didn't lie last time. I'm really better at physics than math." (End of this chapter)