readx;??? Zhu Changyuan never expected that the Ming Dynasty would be so advanced that even Christians had it. Pen, fun, pavilion www. biquge。 info

It is not surprising that there were Christians in the DPRK, after all, many Western missionaries had begun to infiltrate the East during this time. Thinking of this, Zhu Changyuan suddenly asked with some curiosity: "Xu Gongzi has seen Tang Ruowang?" ”

"Naturally, I've seen it." Xu Er smiled silently, took out a thin thread-bound book from his sleeve, handed it to Zhu Changyuan, and said: "When my grandfather was here, I often discussed Western studies with John Tang, Matteo Ricci and others, and this is the book that my grandfather translated from them. ”

Zhu Changyuan took the book, looked at it carefully, and shocked him for most of the time with the name of the book, which turned out to be "Geometric Original". The geometry originally, Zhu Changyuan couldn't be clearer, and it is said that this book was translated by Xu Guangqi, the prince of the Ming Dynasty. suddenly thought of something, looked at Xu Ermo again, and finally understood that his grandfather was Xu Guangqi.

"Hey, no, Xu Guangqi has been an honest official all his life, why did he accumulate such wealth!" Looking at this luxurious courtyard, with such suspicions, he walked through the courtyard walls of the large and small attics of the Xu Mansion with Xu Ermo, and met many maids and servants of the Xu Mansion along the way.

If Xu Guangqi had been honest all his life, this house should have been purchased by Xu Ermo's grandfather.

Zhu Changyuan thought about this question in his heart, and unconsciously came to the outside of a courtyard wall, and suddenly heard a burst of laughter inside the wall, and the atmosphere was very lively.

Xu Ermo smiled: "Zhang Luan, these guys, don't know what new tricks they are playing. ”

After these nobles of the Ming Dynasty, life can be described as rich and colorful, with cockfights and lackeys, wind and snow, and joy.

After following Xu Ermo into the courtyard wall, the first thing that caught his eye was many people, including Zhu Changyuan's familiarity, such as the handsome guy Zhang Luan, as well as Liu Yunzhou from the Ministry of Industry, and even Li Ji, a foreigner.

Seeing Zhang Luan, I thought of his sister the queen who turned everyone upside down, when will I be able to use waste, but I am a queen, and I want to dig the corner of the emperor's wall to cuckold the emperor. This should not be a big difficulty.

But there's no need to rush. In a few years, the Ming Dynasty will fall, and then what will be the first emperor and then the emperor?

Naturally, after these nobles in the small courtyard of the Xu Mansion, most of them did not know Zhu Changyuan. counted, except for Zhang Luan, Li Ji and Liu Yun. There are also three young people, all of whom look like they are unruly.

"Come, I'll introduce you." Xu Ermo led Zhu Changyuan to everyone. Pointing at Li Ji and Liu Yunzhou, he said, "These two are colleagues of adults, so I won't go into details." ”

"This is Xingyang Bo Zhang Luan!" Zhu Changyuan had already seen Zhang Luan. Now seeing that he didn't mean to come forward to recognize him, he also pretended to bow to each other warmly with Zhang Luan.

"Xingyang Bo is terrible, his sister was originally the first emperor and queen in the inner palace. The master of the six houses. Xu Ermo smiled and grabbed Zhang Luan, and said, "Xingyang Bo himself is good at poetry, calligraphy and painting. For a while, Junjie also. ”

"Don't dare to be." Although Zhang Luan was modest in his mouth, his face was full of joy.

Zhu Changyuan nodded in his heart, this guy is really worthy of his name when he says that he is a handsome talent.

"Come, come, come! This is ... ”

Xu Ermo introduced the other three in turn. One is Wen Yongyan, the grandson of Wen Tiren, the first assistant of the cabinet, this guy doesn't look bad, but it's a pity that the clothes he wears, well, how to say it, it can't be said to be tattered, but it's about the same.

Zhu Changyuan is also drunk, you are a grandson of Shoufu, as for being so shabby.

"This is Liang Chengxin, this is Fu Kuang, both are people who love mathematics, and they are both famous."

Zhu Changyuan looked at the two, and it seemed that they were also children of the family.

"Please be seated." Xu Ermo led the group to a high pavilion in the courtyard, under which a long table was placed with tea and snacks.

Everyone sat down in turn, seeing that the grass and trees in the courtyard had withered, Xu Ermo said: "The spring and autumn have passed, how fast, it has been four years since my grandfather passed away in a blink of an eye. In another month, it will be the death day of his old man. ”

"Don't be sad!" Fu Kuang persuaded and said: "When Xu Ge Lao was alive, he worked hard for us and other Ming students, and made great contributions. ”

"Yes, let's first salute the old man with a cup of tea, and may he be well."

After Zhang Luan proposed, he raised his cup and drank it all.

"Yes, Respect the Lord!" Several people raised their glasses at the same time.

Zhu Changyuan despised the few people in front of him, and said in his heart that he was still pretending to be so big when he drank J8 tea.

Fu Kuang took the "Geometric Original" in Xu Ermo's hand, and said with emotion: "If there is no old man, how can I wait for him to see such strange books." But then again, these barbarian states, the number of arts is really good, and it is more unique than my Greater China. ”

"Fu Gongzi's words, please forgive me, I can't accept it." Li Ji stood up and said: "It's not that my Great China is low in mathematics, but that there are not many people who have paid attention to it throughout the ages, and over time, many techniques have been lost, which has caused it to be what it is today." ”

"For example, how many chapters of the ancient "Nine Chapters of Arithmetic" are still left? Another example is the circumference ratio, the specific value has been handed down, but what method did Zu Chongzhi use to get it? ”

The more Li Ji spoke, the more excited he became.

The so-called circumference ratio, also called pi in modern times, people with middle school knowledge and even primary school knowledge know that Zu Chongzhi in ancient China during the Northern and Southern Dynasties calculated that pi was between 3.1415926 and 3.1415927.

The specific data of pi were also known in the Ming Dynasty.

But I don't know how to find this pi, because the method used by Zu Chongzhi has been lost.

Xu Ermo gently put the teacup in his hand on the table, sighed, the sadness in his eyes was deep, and he said, "Speaking of this, it was my grandfather's heart disease. ”

"Oh?" Li Ji asked, "I would like to hear about it." ”

Xu Ermo said: "My grandfather had an unusual relationship with Matteo Ricci back then, but it is said that there was a dispute over this matter. The circumference of the West has only developed in recent years, and Matteo Ricci said that there was a guy named Veda, and he used reason to calculate it once, which was extremely accurate. ”

"My grandfather was not convinced, saying that our China had calculated the circumference ratio as early as the Northern and Southern Dynasties more than a thousand years ago. Matteo Ricci didn't believe it, so he had to ask his grandfather for the specific method of circumcision. ”

When Zhu Changyuan heard this, he smiled secretly in his heart, if he guessed correctly, Wei Da used the formula to calculate pi. And it is understandable that Matteo Ricci asked Xu Guangqi to prove it to him. Isn't it just that Westerners like to prove everything?

There is no rigorous and detailed proof process. People won't believe it. In Western parlance, this is called unfounded.

I only heard Xu Ermo say: "Later, my grandfather devoted himself to studying Zu Chongzhi and even Liu Huizhi's circumcision technique, and after countless attempts, he failed to cut the exact number after all. Compared with Zu Chongzhi's, it's still far behind. ”

Li Ji next to him was also quite emotional. said: "When Xu Gebu cut the circle, I often came over to help calculate, and I saw the hard work. Although today is not the death day of the elderly, it is the occasion of the Mid-Autumn Festival. I would like to cut the circle with my own hands and pay tribute to the old man. ”

"Good!" Xu Ermo stood up and said, "When my grandfather cut the circle. The kid is still a naughty boy and can't see it in person. Today, Lord Li has cut the old circle, so that I can admire my grandfather's demeanor, please do so. ”

"Whew..." Li Ji stood up and exhaled deeply. Carefully recalled the scene when Xu Guangqi cut the circle at that time, and said: "Please prepare the ruler and gauge utensils, I will prepare a little." ”

"Your Excellency will rest for a while, and I'll come later."

Xu Ermo didn't know what tools he needed when he cut the round, he didn't understand, but there was someone who did, his father Xu Ji.

When Xu Guangqi cut the circle, Xu Ji was his biggest helper.

After Xu Ermo left, there was silence in the pavilion.

After a while, Fu Kuang asked: "Master Li, I also know a little about this circumcision technique, it should be part of Liu Hui's "Detailed Explanation of Nine Chapters of Arithmetic". ”

Li Ji shook his head and said: "I don't know much about the specifics, the beating is too big, sometimes three and one millimeter, sometimes three and one millimeter and four centimeters, sometimes there will be three and one millimeter and five centimeters, and so on." ”

When Zhu Changyuan heard his words, he wondered. The decimal in the Ming Dynasty was expressed in millicenti, and one milli and four centi, which means 0.14. Three and a half centimeters is 3.14.

This is undeniable, Liu Hui did cut 3.14 back then, but Xu Guangqi cut a circle out of 3.13, 3.14 and 3.15, he didn't understand, how could Nima cut a beating value?

Wrong.

He also learned about the art of cutting circles, when he was in high school, the math teacher did an outdoor activity of cutting circles, Zhu Changyuan still remembers it deeply, the principle of that thing is actually very simple, that is, the amount of calculation is a little complicated, and it is more difficult to calculate without a calculator, mainly involving the problem of opening squares.

However, every time the circumcision is cut, the formula that can be used in it is immutable, and after eleven consecutive cuts, there will be the 3.1415926 that Zu Chongzhi said, why does Xu Guangqi cut the data out of the circle jumping around?

It's weird.

Zhu Changyuan was thinking about it when he saw that Xu Ermo had already run over from outside the courtyard gate with a group of people. This time, there were not only subordinates, but also a few people in brocade robes and jade belts.

"Hey, Lord Xu is here too."

As soon as Fu Kuang's words fell, everyone stood up, Zhu Changyuan naturally knew that this was the master of the Xu family, Xu Guangqi's only son Xu Ji arrived, and more than that, behind Xu Ji, followed by a string of young people, it seemed that it should be Xu Ermo's brother.

"Let's go, let's go and greet Lord Xu." Zhang Luan took the lead, led everyone down from the high platform where the pavilion was located, and slowly walked towards Xu Ji.

"Lord Xu!" The crowd bowed and saluted.

"No need to be polite!" Xu Ji also bowed and returned the salute, looked at Li Jidao: "I heard that Lord Li is going to cut a circle in my Xu Mansion, and someone Xu is willing to accompany him for the adults to drive!" (To be continued.) )

ps: I'm only updating two chapters today.,I had a fight with the foreman.,I'm really not in the mood to code words.。 Intranet unique URL: