Chapter 136 It’s not just Han Gonglian
Han Gonglian?
Hearing this name, Xu Yun's expression suddenly froze.
I didn't expect it. I didn't expect it.
Candidates given by Lao Su.
It's actually him?
Han Gonglian.
This was a mathematician from the Northern Song Dynasty who left very little information. 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 number these days is similar to the nickname of Bilibili in later generations, and everyone can choose it.
Apart from those well-known users, there are only a few ordinary people who can be remembered, such as those who have agreed to write books and the Mongolian top order.
However, only from the few remaining words, later generations can still easily judge Han Gonglian's ability.
The first year of Song Yuanyou.
Han Gonglian was appointed as a guard officer in the Ministry of Personnel, and his rank was the lowest Zhengjiu rank.
At that time, Lao Su became the Minister of the Ministry of Civil Affairs and was ordered to inspect the armillary sphere used by the Taishi Bureau and others, and to prepare a new one.
As a result, during the visit, Lao Su heard that Han Gonglian was proficient in mathematics and astronomy and was the most powerful mathematician in Bianjing.
Lao Su came to the house in person and told him the outline of the instrument program 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 accordingly.
Han Gonglian wrote a volume of "Nine Chapters of the Pythagorean Test Huntian Book" 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 the ancients said, the design of the water wheel was unique and highly feasible.
Therefore, this plan was selected and submitted to the court for approval.
The second year of Yuanyou.
Han Gonglian was appointed as the system officer and began to make new rituals.
Yuanyou seven years.
The instrument was finally completed and named Yuanyou Armillary Instrument.
At the same time, in history, Han Gonglian is also considered to be the most critical figure besides Lao Su in the production process of Yuanyou's Armillary Sphere.
So it can be seen.
Although Han Gonglian did not write much in history books, his mathematical ability was obviously much higher than that of ordinary people.
From a certain perspective.
He actually resembles a later Portuguese player named Edel.
He was unknown before, almost no one had heard of his name, and he had never played much.
As a result, he came on as a substitute in the 2016 European Cup final and sealed his throat with a sword to help Portugal win the championship. After that, he was silent again.
no way.
Although mathematics in the Song Dynasty developed very rapidly, the feudal dynasty was still dominated by personnel struggles.
Many mathematicians don't have many opportunities to show off their skills, let alone be included in the history books.
Of course.
The truth is this.
But if he is really that kind of top-notch mathematician, he should be able to leave some records in the history books.
For example, Qin Jiuzhao.
Such as Yang Hui.
Another example is the man who kidnapped Nobel’s wife, well, this doesn’t count.
So let’s put it in a more objective position:
Han Gonglian should be a high-level or even near-top talent in mathematics.
But I’m afraid it’s still a little far away from the ‘era ceiling’.
So Xu Yun thought for a while.
I'm still going to ask Lao Su again to see if I can find a few more talents like Han Gonglian.
After all, the calculation workload this time is quite large, and eggs can’t just be put in one basket:
"Master, if it goes according to 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 the master still has someone to choose from, he might as well find a few more capable people to assist him as a precaution. ”
Lao Su nodded while listening, seemingly accepting 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.
I'm afraid it is somewhat different from the existing knowledge, and it may even need to be refreshed.
If only Han Gonglian was invited, it would be okay if the other party could understand justice.
But if there is any lag or confusion.
Then 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. After half a minute, his eyes suddenly lit up:
"Xiao Wang, can you roughly describe the mathematical knowledge you mentioned in words?"
Xu Yun gave him a strange look, a little confused about Lao Su's purpose, but still nodded:
"This is not difficult. After all, the villain is what he read in the book. It is easy to outline 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 was a mathematician who lived in a cottage in the countryside of Fuzhong. If he could be persuaded to come to Bianjing to help, the accuracy of the mirror would 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:
"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?
Talking about the famous mathematician in ancient China.
The first thing that comes to many people's minds is most likely 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.
And many categories can be divided according to their contributions and directions.
For example, in terms of influence on modern mathematics, Qin Jiushao is undoubtedly the top choice.
Because among the 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.
In terms of epoch-making and 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 compiled 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 since the Tang and Song Dynasties, standardized the mathematical framework of Tianyuan Shu, and brought Chinese algebra from unsigned calculation to signed calculation.
In the triangle field, Jia Xian is undoubtedly the best among the best.
Do you still remember the Yang Hui triangle mentioned in copy 1665?
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.
Therefore, later generations defined this law under the name Yang Hui Triangle.
The reason given by the 2011 Asian Mathematics Conference is that Yang Hui's records are supported by physical evidence. There is actually nothing wrong with this logic.
in addition.
Jia Xian also created the square root methods of "the multiplication method" and the "multiplication method",
It is an efficient method for finding numerical solutions to higher-order equations.
That's right.
Find numerical values for higher degree equations.
Want to know?
Europe these days is still using "Roman numerals".
Yes, it is very difficult to calculate numbers and tables, let alone perform such complicated square root calculations.
The calculation procedure of Jia Xianzeng's multiplication method is roughly the same as that of the European mathematician Horner (1819 AD), but it is 770 years earlier than the other party.
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.
Whether 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. Xu Yun did not consider him at all from the beginning.
Because Jia Xian's birth and death time is also unknown to later generations, but most opinions are that he died before Song Huizong ascended the throne.
According to the records of "History of Song Dynasty·Yiwenzhi".
Jia Xian completed the "Nine Chapters of the Yellow Emperor" around 1050. At that time, he held the position of 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 is generally held by adult men aged 25-35.
At the same time, Wang Zhu wrote a sentence in "Guochao Meeting":
"Xian Jin 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."
Wang Zhu wrote "Guochao Huiyao" in 1043, and it was completed in the autumn of 1045.
That is to say.
In 1045 AD, Jia Xian was at least 25 years old.
It is now 1100 AD, and a full 55 years have passed.
If Jia Xian is still alive, he is guaranteed to be 80 years old, maybe even 90 years old or higher.
Although Lao Su is also eighty years old, who is he?
Former Prime Minister!
Whether it is the material standard of life or the level of medical care they enjoy, it can be said that there is no one in a million, or even a million.
But Jia Xian was just an ordinary petty official, and he resigned not long after.
In terms of living material standard, it is far lower than that of Lao Su. At most, he is at the level of a small landowner, and maybe not that rich.
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 defines him as '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 he could persuade Jia Xian, he might even come from Yingtian Mansion!
Yingtianfu is Baixia in later generations, and Bianjing is Junyi.
The distance from Baixia to Bianjing is more than 600 kilometers, which would take three hours by train in later generations. It was quite a long distance in ancient times.
So we can judge from this.
At present, Jia Xian's physical condition may be quite good, otherwise he would not be able to withstand such a long journey.
How to say it
Although it is surprising, 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 friends with the villain for a long time. If we can get help from this person, we can make a telescope happen!"
Later, Lao Su mentioned several names to Xu Yun, all of whom were unemployed mathematicians and 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 even more are names of people who have never been heard of in future 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 was making the new instrument. At that time, he basically searched for mathematicians from all over Bianjing, and he still had 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 King 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 is loved by 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 doesn't understand.
Not long after he ascended 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 kicking 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 Jin Jun came, he 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, and his status is enough to send Xiao Li and Xiao Zhao away.
Lao Su's mansion is not very big, and several people's classes are in the front yard, only a short distance from the gate.
After walking for a while, the three of them arrived at the door.
"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 you is better than ten years of reading.
What Mr. Wang said today really enlightened me. I am afraid that I will never forget the theory of gravity and planets in this life. ”
Xiao Zhao's expression and tone were sincere, and what he said was from the bottom of his heart, rather than 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 point of breaking the knot. The concept of handing over is gone.
And the other side.
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 King Jian is overly complimentary. The villain is just paraphrasing the contents of the letters written by the sages.
Just like the teachings of Meng Xue, preaching the books of sages can be done by another person.
What should be truly admired is the wisdom of the sages, which is as vast as the sea of stars, but it is unknown 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 the prince hadn't mentioned it, I would never know until my death that there are such mysterious sects as the Fengling Yueying 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 comforted:
"My lord, you have to look forward and stop talking about sentimentality.
As for the craftsmen and property matters, I will definitely take care of them after returning to the palace, and strive to restore such a rare object as the astronomical telescope as soon as possible! ”
Xu Yun nodded, subconsciously trying to persuade His Royal Highness King Jian to move out of the palace.
However, considering that it was not appropriate to have a casual conversation, in the end, I could only turn into a stale breath of depression.
Then he looked at Xiao Li on the side and smiled:
"Miss Li, let's say goodbye today."
At this time, Xiao Li was drooping his eyebrows and waved to him in a depressed tone:
"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, and soon thought of something else.
With a little expectation and nervousness, he said to Xu Yundu:
"Wang Lin, when the astronomical telescope starts to be made, can I still come and watch?"
Xu Yun nodded heavily and agreed happily:
"Of course."
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 jobs 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.
Then the three of them exchanged a few simple polite words and parted outside the door.
Xu Yun followed the courtyard and returned to the east wing.
He planned to rest for a while and summarize the knowledge points he was going to write to Jia Xian.
If there is still time.
Then I thought about what to do next.
As a result, I walked to my own courtyard and hadn't even entered the courtyard yet.
Then he saw Wang Zhen, a cold-faced man, with his arms folded, standing at the door of his courtyard like an iron tower.
See this situation.
Xu Yun was shocked subconsciously:
Could it be that Wang Yue is in trouble again?
After all, we had only gone through the period when the possibility of accidents was greatest, and we were far from completely free from risk.
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 eagerly:
"Master Colonel, are you here? Could it be that the condition of the Lieutenant has changed?"
Seeing Xu Yun worried about Wang Yue, Wang Zhen felt warm in his heart, smiled and waved his hand:
"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:
"Me?"
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 now, 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 quickly mastered in a short time. Are you interested?" (End of Chapter)