Survivor's Guide to Survival

"The process of the birth of mathematics is also the process of the evolution of human civilization. It originated from the early production activities of human beings. It was first obtained from direct observation and life experience of human beings. With the gradual progress of production and life, human beings are no longer satisfied with simple memorization. number, and thus the greatest abstraction in the history of mathematics was born."

A gray-haired old man stood in the middle of the podium and talked endlessly. With a wise smile on his face, he raised his hand, and the courseware on the screen jumped to the next picture: "The West has developed geometry, and China has developed geometry." Developed counting chips, which are early numbers.” The picture is divided into two parts, with a few simple geometric figures appearing on the left half, and some small wooden sticks arranged in a pile on the right half.

There was laughter from the audience, as if amused by the cultural differences between the two sides.

The old man also smiled: "It's really interesting, isn't it? What's more interesting is that despite the geographical distance between China and the West, the environment for cultural development is completely different, and the foundation of research is also very different, but China and the West seem to be on different trajectories. In the long course of development of Western mathematics, there are many ingenious collisions of similar sparks. In the process of human beings exploring wisdom, great souls will always meet together."

The picture on the stage was swiped backwards, and an all-too-common dice appeared, and the students in the audience laughed again.

The old man was not angry, but still smiled calmly, and when the laughter in the audience gradually weakened, he stretched out both hands and made a gesture of pressing down, signaling for everyone to be quiet: "Everyone has seen this before, it is a common bird. Ordinary dice, but this is the product of the ancestors who combine Chinese and Western. The four-sided sheep bones in the ancient Egyptian Pharaoh’s tomb and the eighteen-sided dice in the Qin Emperor’s Mausoleum have not yet been counted. Later, in the process of cultural integration, we gradually produced The six-sided die with points, it is given even more meaning."

Under the stage, Guo Lu was already dazed, he turned his head to see Huo Yizhou sitting next to him writing, his jaw almost dropped from shock: "No way, Huo Yizhou, you don't even know how to use such vain nonsense!" Want to remember?"

"Ah?" Huo Yizhou heard Guo Lu calling himself, put down his pen, and turned his head in confusion, "I'm not memorizing the professor's speech."

"Then what are you doing?" Guo Lu couldn't sit still. When he heard Huo Yizhou's words, he became curious and couldn't help but move his head closer to read the contents of his notes. Seeing this, he couldn't control himself and let out a low voice. : "Damn it!"

The top half of the notebook is densely packed with several calculation formulas, while the bottom half is used as a scratch paper and messed up——Huo Yizhou is actually doing math problems.

In the quiet surroundings, Guo Lu's voice was particularly loud. Many people around turned their heads to look at the two boys sitting in the back row. Disapproval seems to be expressing dissatisfaction with them for disrupting the order of the venue.

"Sorry... I didn't do it on purpose." Guo Lu stuck out his tongue, clasped his fists in an apologetic gesture, and seeing that everyone turned their heads away, he lowered his voice and said to Huo Yizhou, "God Huo, what are you doing here?" What's the problem?"

Huo Yizhou said in a low voice: "The question on the lecture ticket." He raised his hand high as he spoke.

Guo Lu was taken aback, turned his head and found that Huo Yizhou was the only one with his hands raised in the audience, he panicked even more.

After looking around the audience, the old man felt a little disappointed.When he finally saw the lonely hand raised in the last row, his eyes lit up again, and he said in a gentle tone: "The male student in the last row wearing a denim jacket, please tell me your answer."

As soon as the old man's words fell, Guo Lu heard whispering voices from around him, and he didn't understand, but he was afraid of affecting Huo Yizhou, so he casually picked up a classmate next door and quietly asked: "Student, what is it now?" Link? A lottery?"

"It's luckier than the lottery." The classmate who also didn't raise his hand rolled his eyes angrily, and glanced at Huo Yizhou who stood up with some jealousy. "Professor Xu drew someone to answer the question printed on the admission ticket." What! A chance to have a direct conversation with Daniel... If only I also found out that there is a question on the admission ticket."

Guo Lu stared at the admission ticket in his hand, turned left and right, but couldn't find any words with similar titles, feeling like an alien.

No, Huo Yizhou should be the only one in the audience who is an alien. Otherwise, why was he the only one who found out that there was a problem with the ticket?Guo Lu thought sourly.

Huo Yizhou didn't look at the notebook, but looked at the old man respectfully, and said a number: "The answer is 5/324."

"Correct," the old man happily snapped his fingers, with a rare mischievous look in his eyes, "Little classmate, can you tell me about your problem-solving ideas?"

霍一舟道：“一共六个骰子，一个骰子6个面，六个骰子的所有变化有6的6次方种可能，同时抛出123456存在1×2×3×4×5×6种排序，接下来就是简单的概率约数问题了。”

Only then did Guo Lu discover that the design of the admission ticket is composed of the graphics of six dice. The numbers on the dice are subtly integrated into the main information of the admission ticket. The question mark at the end is the theme of this speech. It was discovered that there was actually a simple probability question hidden on the admission ticket.

"The thinking is very clear, and the calculation is quite fast." The old man smiled and rolled his eyes. "The young man is from the Department of Mathematics?"

Huo Yizhou shook his head: "I major in astrophysics."

"It turned out to be a kid from the Department of Astronomy," Professor Xu laughed. "Galileo once said that 'mathematics is the language God uses to write the universe'. Those who want to pry into the mysteries of the universe must master mathematics."

Guo Lu didn't even bother to listen to the next lecture - Huo Yizhou forced him to listen to this lecture. As a scumbag, he couldn't even count 6 to the 6th power. The history of development is simply difficult.But when he saw Huo Yizhou next to him with bright eyes all the time, he had no choice but to quietly swallow the complaints that came to his lips.

After the end, Huo Yizhou, who has never been very social, went uncharacteristically and squeezed through the crowd to the side of the stage. He looked up at Professor Xu who was still sorting out the materials, and asked him, "Professor Xu, what do you think the future will be?" Is it computable?"

The old professor did not laugh at the young man's whimsy. He put down the materials at hand, thought carefully for a while, and slowly organized his words, and replied: "The world we live in is not static, and the accuracy of calculations is changing all the time. You can never control all the variables with perfect precision."

"You are a student of astrophysics, let me give you a simple example," the professor said, "It's like if a golden dice is about to fall to the earth, we can get its predetermined fall location through calculation, but in its No one can be sure whether it will really fall at that place even before it actually falls to the ground. What humans need to do is to minimize the impact on the earth after the golden dice falls. .”

The volume of the professor's speech was not high, but every word hit the young man's heart with force.Huo Yizhou digested on the spot for a while, his eyes unconsciously shone, he nodded sincerely to the professor and said, "Thank you, professor, I understand."

"The young man is pretty good," the professor was also very happy, and handed a business card to Huo Yizhou, "I have a chance to visit the institute."

Huo Yizhou took the business card graciously, and once again thanked Professor Xu respectfully.

The assistant standing behind Professor Xu couldn't wait a long time ago. Seeing that the two of them had finished the conversation, they walked up quickly and whispered a few words in the professor's ear. Seeing the professor's face change slightly, Huo Yizhou hurried to the backstage go.

"Oh, by the way," the professor who walked halfway stopped suddenly, and turned his head to look at Huo Yizhou who was still standing there, he blinked at Huo Yizhou, "I must remember to come, there are really golden dice in the institute. "

Huo Yizhou was amused by the old scientist, nodded seriously and agreed: "Good professor, I will definitely come soon."

Seeing Professor Xu disappearing behind the door surrounded by staff, Huo Yizhou looked down at the business card in his hand, feeling unreal.

Professor Xu's name "Xu Chengguo" was printed on the business card, with "White Whistle Research Institute" written next to it.

Guo Lu stared straight at the sight: "Dude, you are so awesome this time! Mr. Xu invites you to visit the White Whistle Research Institute!" He took out his mobile phone and "clicked" on Huo Yizhou's hand holding his business card Take a picture: "No, I must post this to Moments to show off... My brother Guo Lu was invited by an academic boss to visit the research institute. I can brag about this until I graduate from university!"

With a headache, Huo Yizhou stretched out his hand to cover Guo Lu's phone screen, preventing him from posting on Moments: "Student Guo Lu, the Nancheng Primary School next door organizes a picnic in the small woods next to the Baishao Research Institute every autumn tour, you hurry up this time to register for the second half of the spring." still have a chance."

"It's different," Guo Lu argued, "There were at least three or four hundred audience members in this lecture, but you were the only one selected by Professor Xu to answer the questions and hand over your business card. Won the special prize! Super lucky!"

"Okay, don't stand here and chat, go eat first, and go to the pharmacy after eating." Huo Yizhou changed the subject.

As soon as Guo Lu heard that Huo Yizhou was going to the pharmacy, he immediately took back his phone and stopped making trouble, and asked his brother with concern: "You still have a cold? It's been three days, do you want to go to the hospital?"

"No, it's just a common cold." Huo Yizhou unwrapped the tissue and rubbed his nose with a tissue. "Drink some medicine and save some public resources for the hospital."

Guo Lu nodded and followed his friend's pace: "Alright then, hurry up and eat. After eating, I'll go to the pharmacy to buy some Radix Banlangen."

"What medicine are you taking if you are not sick?" Huo Yizhou looked at Guo Lu in puzzlement.

Guo Lu rubbed his head and smiled: "Banlan cures all diseases, I will also prevent it."