Hearing this name, Xu Yun's expression suddenly froze.
I didn't expect it. I didn't expect it.
The candidate given by Lao Su was actually him?
Han Gonglian.
This was a mathematician from the Northern Song Dynasty who left very little information, and later generations did not even know his name.
Only in the "Yizhi of Guping County" about his birthplace, there is a brief mention of his self-titled Mr. Yang Huai.
After all, the account numbers these days are similar to the nicknames of Bilibili in later generations. Apart from those well-known users, the only ordinary people who can be remembered are the few who have agreed to write a book and the Mongolian top order.
However, only from the few surviving words, later generations can still easily judge Han Gonglian's ability.
In the first year of Yuanyou of the Song Dynasty, Han Gonglian was appointed as a guard official in the Ministry of Civil Affairs, with the lowest rank of Zhengjiin.
At that time, Lao Su took office as the Minister of the Ministry of Civil Affairs and was ordered to inspect the armillary sphere used by the Taishi Bureau and others and prepare to make a new one.
As a result, during the visit, Lao Su heard that Han Gonglian was proficient in mathematics and astronomy, so he told him about the instrument program outlines of the previous astronomers Zhang Heng, Liang Lingzan, Zhang Sixun and others.
I hope he can get to the bottom of it and imitate it.
Han Gonglian wrote the "Huntian Book of Nine Chapters on the Pythagorean Test" for this purpose, and made a wooden mold like a wheel.
After reading it, Lao Su thought that although it was not as good as what the ancients said, the design of the water transport wheel was unique, so he chose this plan.
In the second year of Yuanyou.
Han Gonglian was appointed as the system officer and began to make new rituals.
The seventh year of Yuanyou.
The instrument was finally completed and named Yuanyou Armillary Instrument.
So it can be seen from this.
Although Han Gonglian did not write much in history books, his mathematical ability was obviously much higher than that of ordinary people.
He is actually very similar to a later Portuguese player named Edel, who was unknown before, but ended up coming on as a substitute in the European Cup final of 2016, sealing his throat with a sword and helping Portugal win the championship. After that, he became silent again.
no way.
Although mathematics developed very rapidly in the Song Dynasty, the feudal dynasty was still dominated by personnel struggles.
Many mathematicians don't have many opportunities to show off their skills, let alone be recorded in history books.
Of course.
The truth is always the same, but if you are really the kind of top-notch mathematician, you should be able to leave some records in the history books.
For example, Qin Jiuzhao, Yang Hui, and the man who kidnapped Nobel's wife.
So to put it more objectively,
Han Gonglian should be an advanced, even close to top talent in mathematics.
But the distance from the ‘era ceiling’ is probably still a little far away.
Therefore, Xu Yun thought about it and decided to ask Lao Su to see if he could find a few more talents similar to Han Gonglian. After all, the computing workload was quite large.
"Sir,&bsp&bspIf you go by what you said, Mr. Yang Huai is obviously a pretty good candidate.
However, the calculation steps required for astronomical telescopes are extremely complicated, and it would be time-consuming and laborious for one person to do it alone.
Therefore, if I still have someone to choose, I might as well find a few more capable people to help, just in case."
Lao Su nodded slightly and seemed to accept the suggestion.
He had seen Xu Yun tinkering with generators and electrolytic cells, and knew that some of Fengling Yueying Sect's knowledge was extraordinary and might be somewhat different from existing knowledge.
If only Han Gonglian was invited, and the other party could understand justice, then it would be okay.
However, if there is a glitch, the entire 'recovery' process of the astronomical telescope is likely to be delayed or even stalled.
Then he carefully thought about the mathematicians he knew.&bsp&bspAfter half a minute,&bsp&bsphis eyes suddenly lit up.
"Xiao Wang,&bsp&bspCan you roughly describe the mathematical knowledge you mentioned in words?"
Xu Yun gave him a strange look,&bsp&bsp somewhat confused about Lao Su's purpose,&bsp&bspbut still nodded.
"This is not difficult. After all, the villain is just what he read in the book. It is easy to summarize some key points."
Seeing this, Lao Su waved his hand and said excitedly
"That's very good. Later you go to the study with me, write a letter, and send it to Yingtian Mansion.
There is a mathematician who lives in the countryside of Fuzhong, and if we can persuade him to come to Bianjing to help, the accuracy of the mirror will definitely be achieved!"
Seeing Lao Su who showed such excitement and admiration for the first time, Xu Yun suddenly became interested.
"Who is it?"
Lao Su was silent for a moment, organized his words, and said with a little reverence on his face
"This person's surname is Jia Mingxian, and he studied under Chu Yan, the master of Jiuzhang Tuibu."
Before Lao Su finished speaking, Xu Yun's eyelids twitched hard.
Oh my god.
It's actually Jia Xian?
This monumental figure in the history of ancient mathematics is not yet dead at this time?
When talking about famous mathematicians in ancient China, the first thing that comes to many people's minds may be Zu Chongzhi.
He was the first man in the world to calculate pi to the seventh decimal place, more than a thousand years earlier than in Europe.
But in addition to Zu Chong, there are many outstanding people in mathematics in China,&bsp&bspand they can be divided into many categories.
For example, in terms of influence on modern mathematics, Qin Jiushao is undoubtedly the top choice.
Because among local mathematics, only his Dayan Qiu Yishu and the Chinese Remainder Theorem are still retained by modern mathematics.
The remaining various ancient Chinese mathematical techniques and mathematical tools were all reinvented by Western mathematicians.
And in terms of epoch-making pioneering.
Then there is no doubt that Liu Hui and Zhu Shijie are the first ones, because they respectively correspond to two huge leaps in China's two mathematical peaks.
Liu Hui organized the mathematical knowledge of the entire Qin and Han Dynasties, established the overall framework of ancient Chinese mathematics, and summarized the overall calculation framework of linear algebra.
Roughly similar to Euclid in Greek mathematics.
Zhu Shijie organized mathematics from the Tang and Song Dynasties, standardized the mathematical framework of Tianyuan Shu, and brought Chinese algebra from unsigned calculations to signed calculations.
In the triangle field, Jia Xian is undoubtedly the best among the best.
Do you still remember the Yang Hui triangle mentioned in the copy?
Yang Hui's triangle was actually proposed by Jia Xian, so some people call it Jia Xian's triangle.
However, due to the loss of his work, his excellent ideas were recorded by another great mathematician Yang Hui, so later generations defined this law under the name Yang Hui's triangle.
in addition.
Jia Xian also created the square root methods of "the method of multiplying and opening squares" and "the method of opening and closing by multiplying and multiplying".
It is an efficient method for finding numerical solutions to higher-order equations - at this time, Europe was still using "Roman numerals", and it was very difficult to calculate in tables, let alone perform such complex square root operations.
The calculation procedure of Jia Xianzeng's multiplication method is roughly the same as that of the European mathematician Horner (AD), but it is earlier than him.
This is precisely an important link in the calculation of mirror accuracy, and there are still many derivative mathematical formulas to be solved.
That is to say.
No matter from the perspective of ability or professionalism, Jia Xian is a more suitable candidate than Han Gonglian.
But at the same time, he is also a figure outside Xu Yun's plan.
Because Jia Xian's birth and death times are also unknown to later generations.
However, according to the records of "History of Song Dynasty·Yiwenzhi".
Jia Xian completed the "Nine Chapters of the Yellow Emperor's Sutra" around the year 2010. At that time, he was serving as the Zuoban Dianzhi.
Zuoban Dianzhi is one of the three classes and holds the ninth rank official position.
According to the comparison table of official positions and ages in the Song Dynasty collected by later generations, Zuoban Dianzhi was generally held by adult men aged -10 years.
At the same time, Wang Zhu wrote a sentence in "Guochao Meeting"
"Xianjin is the official of Zuoban Dianzhi, Ji Li Taishi. The calculation of Xian is also wonderful, and there are books passed down to the world."
The time when Wang Zhu wrote "Guochao Huiyao" was in 2000, which means that by that time, Jia Xian was at least 18 years old.
Now that the year has passed, if Jia Xian were alive, he would be at least 80 years old, maybe even 90 years old.
The main reason why Lao Su can live to this age is that he is a former prime minister, and his material standard of living can be said to be one in a million, or even one in a million.
But Jia Xian was just an ordinary petty official, he resigned not long after, and his material standard of living was much lower than that of Lao Su.
Therefore, in the mathematical community of later generations, most people believed that Jia Xian had died when Emperor Huizong of the Song Dynasty came to the throne.
Even the encyclopedia’s definition of him is ‘an outstanding mathematician in the first half of the eleventh century’.
But now it seems
Jia Xian is actually still alive?
And according to what Lao Su said.
If Jia Xian can be persuaded, he might even come from Yingtian Mansion!
Yingtianfu was known as Baixia in later generations. It was more than 600 kilometers from Baixia to Bianjing, which was considered a long distance in ancient times.
It can be judged from this that Jia Xian's current physical condition may be quite good, otherwise he would not be able to withstand such a long journey.
This is undoubtedly good news.
After all, Xu Yun's goal is not just as simple as an astronomical telescope.
Some things are not like astronomical telescopes. They say they can't calculate them, but in fact they can calculate them easily with their own abilities.
Even in terms of Xu Yun's personal ability, the calculation power of those things is completely impossible, and it requires external help.
Therefore, facing Lao Su's proposal, Xu Yun agreed on the spot.
"Mr. Tongyu has been a close friend of the villain for a long time. If we can get this person's help, we can make the telescope a success!"
Later, Lao Su mentioned several names to Xu Yun, all of whom were unemployed mathematicians who stayed in Bianjing or within twenty or thirty miles around.
One or two of them, Xu Yun, had heard of their names, and their abilities were much inferior to those of Jia Xian and Han Gonglian. They were considered high-level talents.
And more of them are names of people who have never been heard of in later generations. Their abilities are unknown, but they are estimated to not be very high - after all, Lao Su needed a lot of mathematical calculation support when he made the new instrument. At that time, Bian Jing was basically
I have searched all over the place with mathematicians, and I still have a deep understanding of the entire Bianjing mathematics circle.
Unless they are some rising stars, their abilities obviously cannot be too strong.
Now that things have reached this point, today's course is naturally almost over.
Then Lao Su thought about it and said happily to Xiao Zhao and Xiao Li
"Your Highness Prince Jian, Qingzhao, why don't you have a dinner at your residence before leaving?"
Xiao Li and Xiao Zhao looked at each other and declined.
"Young master, I love you, but I need to return to the palace as soon as possible to find the master craftsman. After all, you also know about my brother, so let's do it next time. I will definitely do it next time."
Looking at the Riddler with a 'you know' look on his face, Xu Yun blinked in confusion.
As a science major who is not a history major, he naturally does not know that not long after he took the throne, Song Huizong had already shown a little bit of the flower-and-bird emperor.
Spend at least three hours a day drawing and writing, and occasionally you can change it to playing Cuju or having sex.
His brothers wanted to see him, but they could only be granted permission in the afternoon.
Of course.
He told Empress Dowager Xiang that he liked to review memorials alone. In addition, Empress Dowager Xiang died early, so she was actually deceived by Song Huizong before her death.
It's quite ironic that Empress Dowager Xiang, a low-end version of Cixi, dared to do this when Zhao Ji was still alive. However, when the Jin army came, she was intimidated.
Then Lao Su returned to the study to prepare a letter to Jia Xian, while Xiao Li and Xiao Zhao handed it over to Xu Yun to send it off.
After all, Xu Yun is both a "teacher" and a disciple at the moment, and his status is enough to send Xiao Li and Xiao Zhao away.
Lao Su's mansion was not very big, and the class was in the front yard, so the three of them arrived at the door after walking for a while.
"Prince."
When they were about to leave, Xiao Zhao took the initiative to offer his hand to Xu Yun
"The ancients said that listening to your words is worth ten years of reading.
What Mr. Wang said today really gave me a sudden enlightenment. I am afraid that I will never forget the theory of universal gravitation and planets."
This chapter is not over yet, please click on the next page to continue reading! Xiao Zhao's expression and tone are very sincere, and he speaks from the bottom of his heart, not polite words.
After all, if he wasn't interested in science, he wouldn't have followed Xiao Li to Lao Su's house to meet Xu Yun - at that time, Xiao Li didn't know that Xu Yun had been promoted. For a prince to meet a servant, this was already beyond the ordinary.
The concept of handover is gone.
On the other hand, Xu Yun also had a good impression of this handsome man. Every time he saw him, he seemed to see the same handsome reader.
"His Royal Highness Jian Wang is overly complimentary. This villain is just paraphrasing the contents of the manuscripts written by the sages. Just like the teachings of Meng Xue, another person can do it.
What we should truly admire is the wisdom of the sages, which is as vast as the sea of stars, but we don’t know how much has been buried in time.”
Xu Yun's words seemed to touch something in Xiao Zhao's mind, and he also sighed and said
"Indeed, if Mr. Wang hadn't mentioned it, I would probably never know until my death that there are such mysterious sects as the Wind Spirit Moon Shadow Sect in the world.
By the way, Prince Wang, are you the only one left in the Fengling Yueying Sect now?"
When Xu Yun heard this, a trace of sadness flashed in his eyes, and his face showed bitterness and heartache.
"The Wind Spirit Moon Shadow Sect has long since disappeared over the years. I just got lucky and got the inheritance by chance.
Just like an astronomical telescope, many inheritances have long been fragmented. We and other future generations only hear their names but never see their objects, alas."
Xiao Zhao shook his head sadly, then he coughed lightly and said to Xu Yunde
"My lord, you have to look forward and stop talking with sentimental words. As for the craftsmen and property matters, I will definitely take care of them after I return to the palace. I will rely on you even more by then."
Xu Yun nodded, intending to persuade His Royal Highness Prince Jian to move out of the palace, but considering that it was not appropriate to have a close relationship, he could only become depressed and turned into a stale breath.
Then he looked at Xiao Li beside him and smiled.
"Miss Li, let's say goodbye today."
At this time, Xiao Li was drooping his eyebrows and waved his hand at him in a depressed manner.
"I'm sorry, Wang Lin, I can't help you with the astronomical telescope this time."
"Hey, what's this?"
Xu Yun made an indifferent gesture towards her and said with a smile
"Don't be anxious, Miss Li. We have plenty of time. Maybe in the next chapter, ahem, something will trouble you next time!"
Xiao Li was still confused and nodded. He quickly thought of something again, and with a little expectation and nervousness, he said to Xu Yundu
"Wang Lin, when the astronomical telescope starts to be built, can I still use my bladder?"
Xu Yun nodded solemnly and agreed happily.
"sure."
Seeing that Xiao Li regained his energy now, he breathed a sigh of relief.
After all, although the status of women in the Song Dynasty was not low, it still challenged the inherent concept of a girl who had not left the court to mix with a bunch of big men.
Xiao Li herself is not worried, but her father, Comrade Li, has already accepted his fate.
Therefore, the biggest obstacle comes from Xu Yun and Lao Su.
After all, scholars regard themselves as noble, and people like Lao Su are more afraid of losing their security in the late festival, and may find ways to reject themselves.
Seeing that Xu Yun personally agreed to let him observe the production of a wave of telescopes, it also meant that the biggest obstacle was lifted.
Afterwards, the three of them exchanged a few simple words of courtesy and then parted outside the door.
Xu Yun followed the courtyard and returned to the east wing.
I plan to take a short break and summarize the knowledge points I plan to write to Jia Xian.
If you still have time, think about what to do next.
As a result, I walked to my own courtyard and hadn't even entered the courtyard yet.
He then saw Wang Zhen, a cold-faced man, standing at the door of his courtyard with his arms folded like an iron tower.
Seeing this situation, Xu Yun was subconsciously shocked.
Could it be that Wang Yue is in trouble again?
After all, we had only passed through the period when the possibility of accidents was greatest, and we were far from completely free from risks.
In the Song Dynasty, when the medical environment was incomplete, something could happen at any time after antibiotic injection.
So he hurriedly walked forward, bowed his hands to Wang Zhen, and said anxiously:
"Master Captain, are you here? Could it be that the Lieutenant Colonel's condition has changed?"
Seeing Xu Yun worried about Wang Yue, Wang Zhen felt warm in his heart and waved his hand with a smile.
"Xiao Wang, please rest assured that my brother is fine. Wang is here mainly for you."
Xu Yun looked stunned and pointed at himself with his index finger.
"I?"
Wang Zhen nodded and took out a few thread-bound books from his body.
"If you hadn't taken action, Xiao Wang, Wang and his brother would have been separated from each other by this time, and there would be no way to repay the life-saving grace."
"Wang was thinking about it this morning and suddenly realized that you seemed a little thin, so"
"There are several martial arts secret books here. Although they are not superior martial arts, they can be mastered in a short time. Are you interested?"
Note
Some readers have reported that there have been too many character introductions recently. First of all, the number of these plots has recently reached a high number that surprised me. It is also the highest in the history of this book. You should be able to tell from this chapter. This shows that
Everyone should like or accept this kind of plot.
Secondly, every character introduced in a long way will be of great use later. I won’t spoil the details. I really want you to see it tomorrow.
