(I wish all the candidates that tomorrow’s Comprehensive and English exams will be successful in the plenary session and all will be answered correctly)
At this time, Cao Zheng had already finished explaining how to calculate the length of the curve, and finally said: "After I calculated the length of the curve, I took out a ball of thread and made a section of the curve. After straightening it, I measured the length and calculated it with Chen and others. The results are the same. It can be seen that there is nothing wrong with Chen et al.’s calculations and the formulas they derived.”
"Your Majesty, after obtaining this result, I began to study how to calculate the instantaneous speed of an object at a certain point in time..." Brunevsky continued.
Yun hurriedly interrupted him. "No need to say anything, my dear, I have already understood the use of the mathematics developed by my dear. As for the specific content, the two dears will write these into a book and send it to the palace. Take a look when you have time." Yun just knew what the mathematics they were studying was, and had no intention of accepting the advanced mathematics teacher's lecture again.
After hearing this, Brunevsky felt a little lonely for a moment, but then he recovered and said: "I will write a book with Mr. Cao to talk about this kind of mathematics."
"You must be very careful when writing this book, don't be too quick, and don't make any omissions." Yun said: "From the words of the two dear friends, I feel that in the future, all people who study astronomy must learn this kind of mathematics. The book you have written must be read not only by me, but also by hundreds of people who study astronomy, and it must be read with great caution."
"Yes, Your Majesty." After hearing Yun's words, the two of them hurriedly agreed.
"There is one more important thing." Yun said again: "This book must be written in an easy-to-understand manner. Your explanation just now was a bit obscure. Although the crown prince, the third son, and the fifth son have not studied astronomy, But I have a general understanding, and even studied advanced mathematics at the Royal Academy, but I still don’t understand what you are talking about, which shows that your explanation is obscure. This is not good. Astronomy cannot be studied just by relying on the two beauties. Many people are involved in it, but if those who want to be involved can't even read introductory books, how can they study astronomy? It must be written in a more popular way."
"Yes, Your Majesty." The two agreed again.
Yun gave a few more instructions. However, he was still pessimistic about how many people could understand this book. Mathematics is a subject that requires a lot of talent. Chen Jingrun’s talent is already one in a hundred, but among mathematicians it can only be counted. His work was ordinary; Hilbert was a unique talent, but he also had problems that he could not understand; Poincaré was a peerless genius, but he also lamented that "manpower is exhausted". Based on the mathematical foundation of this era, and Considering the number of people who may come into contact with this book, Yun thinks that in the next ten years, there will be no more than ten people in Gezhiyuan who can understand and use it skillfully.
'Fortunately, in fact, most people don't need to understand this book. They only need to observe the changes in the stars and record the data. The calculations can be left to people who can understand. It is just for promotion, and of course it should be made available to all those who want to study. Astronomers studied this new mathematics.'
After ordering this matter, Yun looked back and saw his two daughters holding the new clairvoyance device and standing by the window looking at the sky. It was cloudy today, and the sun was obscured by the clouds in the south, so during the day It's okay to watch the stars. At this time, Wen Luo was looking with his clairvoyance. Min'er saw her father looking towards them and said hurriedly: "Dad, my daughter doesn't understand what the two gentlemen said, so she just took a look at it." Astrology.”
"Dad, this new type of clairvoyance is really easy to use. The lens tube is only so long, but it can see very distant stars." Wen Luo said excitedly.
"I immediately made a few more clairvoyants and sent them to the palace." Cao Zheng said immediately.
"Of course the newly made clairvoyance must first be kept in Gezhiyuan for my dear friends to observe the stars. How can it be sent to the palace to make toys for children first?" Yun said, "I don't want to see you get involved in officialdom. Bad habits of bureaucracy.”
"I know I was wrong, please forgive me." Cao Zheng said in panic. He just flattered Princess Ganling by the way, but he didn't expect that your majesty would say such serious words. Of course, he was panicked. Yang Zhu and Sicheng were present. Tang, Zhou Wei, Brunevsky and others also hurriedly saluted and apologized.
"This is not a big deal, but Cao Qing and other dear friends, you must remember the purpose of setting up Gezhiyuan. As long as you do your job well, I will not treat you badly. Don't think about it. Other things." Yun said again.
"Yes." Everyone hurriedly agreed.
Yun turned his head again and said to Wen Luo, who said "I'm not just playing around, I'm also studying astronomy and will study it in the future": "Since you are here to study astronomy, of course you should understand that the new clairvoyance must first stay in Gezhi. The principles of the academy.”
"My daughter understands." Wen Luo agreed hurriedly. After she yelled just now, she realized that now was not the time for her to act coquettishly, swallowed the rest of her words, and then agreed honestly.
"Yang Qing, can the recent expenses required by Gezhiyuan be paid on time?" He asked Yang Zhu this question again.
"Your Majesty, since I took over as the envoy of Gezhiyuan, the Ministry of Revenue has always allocated funds on time and has never been delayed." Yang Zhu replied hurriedly.
"That's good. If there is a delay from the Ministry of Revenue, and you come to ask for it in person but still don't give it, you can report the matter to me, and I will definitely deal with it," Yun said again.
"Yes, Your Majesty, I understand." Yang Zhu saluted again.
So far, Yun's purpose of coming to Gezhiyuan today has been achieved. But after finally coming here once, Yun will not just go back. He first observed the stars with clairvoyance, and then asked about the recent Sichengtang, Zhou Wei and others' research, and encouraged them not to be discouraged because of the recent lack of results, but to continue to study seriously. Sichengtang and Zhou Wei hurriedly promised that they would continue to study seriously.
After that, Yun put his two daughters in Cao Zheng's laboratory and took his three sons to inspect the Gezhi courtyard. At this time, the Gezhi courtyard had changed a lot compared to when it was first built. It was even different from when he came to inspect it more than three years ago. They are all different. In the past, most people in the Gezhi Academy studied astronomy, and only a few people studied other things. But now, the people in the Gezhi Academy study a variety of things, including everything. Yun even saw one person make a similar The hang glider thing probably wants to fly. But he obviously hasn't succeeded in the experiment yet.
All the researchers were very excited to see His Majesty coming to inspect, and some even knelt on the ground trembling. Naturally, Yun couldn't comfort him one-on-one, but he smiled and nodded from time to time.
Yun walked through most of Gezhiyuan, and wanted to go through it all, but then a guard who had been guarding outside the courtyard suddenly appeared in the courtyard. Seeing Yun, he quickly walked over and knelt down and said: "Your Majesty, Lifanyuan Fu An, the vice-president of the hospital, and Kelavi, the doctor of the Western Division, asked to see His Majesty, saying that they had something important to report. After the Queen asked what was going on, she sent someone to Gezhi Court to ask Your Majesty to return to the palace to receive them immediately."
"Fu An and Claviyo from Rifanyuan? Why do they want to see me?" Yun asked.
"I don't know, nor do the people who came to deliver the message," the guard replied.
"Is it so important?" Why shouldn't others know about Lifanyuan? Yun was a little surprised.
But now is not the time to be surprised. While Yun sent someone to call Min'er and Wen Luo, he turned around and said to Yang Zhu and others: "I didn't make a complete inspection of Gezhiyuan today. I will come back in a few days when I have free time. ."
"Yes, Your Majesty." Yang Zhu quickly agreed without saying much else.
Yun nodded, and after Min'er and Wen Luo came over, he would take the children away from here and get on the carriage to return to the palace. He noticed that Min'er had some stains on her body, but he didn't care.
"I almost forgot something." At this time, he remembered something again, turned around and said to Cao Zheng and Brunevsky: "My dear friends, you have already given a name to this new type of mathematics, just like algebra and geometry. ?”
"Not at all." Cao Zheng replied: "After I researched new mathematics, I did think about naming it, but I thought of many names that didn't sound good."
"In that case, let me give this new mathematics a name. In my opinion, how about calling it calculus? It is divided into two parts, one is differential calculus and the other is integral calculus." Yun said.
"Calculus? Differential, integral?" Cao Zheng chewed the name over and over again, and then said: "Your Majesty, this name is very good!"
"Since Ai Qing also thinks the name is very good, from now on this mathematics will be called calculus." Yun said with a smile.
Having said this, Yun had nothing to say and left Gezhiyuan to return to the palace.
On the carriage, Wen Luo whispered to Min'er: "Sister, what did you do when you ran out of the laboratory?"
"Look at the research I have funded. You also know that I have funded many people to conduct research."
"Have you seen it all in such a short time?"
"Of course not. I just picked a few to look at. In particular, there is a young man's research. I feel that this person's research will definitely be successful and will be of great use."
