Wang Yuan got a list of Xinxue disciples, but he didn't take the initiative to contact any of them.

The time is not right, and it is not necessary.

If you want to do great things in the future, you must have your own group, and you must also have a large number of flag-waving people. But the "Mind Society" is too loose, and in addition to creating public opinion in the future, it is embarrassing to really do things...... Well, Uncle Wang's inner circle is still useful.

As for the other disciples, they have everything in a mess, and their positions are actually different, but they all like to study the study of mind.

Wang Yangming himself knew about this situation, so he only named a few names.

Among them, Wan Chao, Wang Dao, and Liang Gu are all on the same list as Wang Yuan. In the same year, coupled with the alliance between the same door and the iron fight, even if they were political enemies of each other, they did not dare to kill easily, not to mention that it was impossible for them to become political enemies with Wang Yuan.

In addition, Mu Konghui and Wang Yuan are colleagues of the Hanlin Academy, and they are the people selected by Wang Yangming to preside over the township test, and these relationships are also tightly bound.

Wang Yangming said the names of these four people, which meant that Wang Yuan could make friends with peace of mind and support each other, and there was no one who took advantage of whom.

Uncle Wang also named one person, that is Gu Yingxiang.

Before this gentleman was admitted to the Jinshi, he had followed Wang Yangming to study, but he did not formally apprentice at that time, otherwise he would be a proper senior brother of the royal family. Moreover, Gu Yingxiang and Wang Yuan have similar personalities and hobbies, and they are likely to become real best friends.

First of all, Gu Yingxiang is a mathematician, isn't Wang Yuan also studying mathematics?

Secondly, Gu Yongxiang is not afraid of death, and he is also promoted by quelling chaos. When he was the governor of Raozhou Prefecture, the Leping County Order was captured by the peasant uprising, and the other officials were helpless. Gu Yingxiang stepped forward, took only an old pawn, rode a thin horse, and came to the camp of the righteous army slowly. After a flicker, the county order was rescued and the rebels were disbanded.

Because of this achievement, Gu Yingxiang was taken care of by Zhu Hou and directly recalled to the capital, where he was born as a jinshi and served as a Jinyi guard.

Jin Yiwei experience, that is, in Jin Yiwei is in charge of document access. Shen Lian in the movie "Embroidered Spring Knife", there is really a person in history, when he first entered the Beijing Division, his official position was also Jinyiwei's experience.

Look at how similar Wang Yuan and Gu Yingxiang are!

They are all disciples of Xinxue, they are all from Jinshi, they are all favored by the Son of Heaven, they are not afraid of death, they are all martial arts, and they are all studying mathematics. If you can't become friends after you get to know each other, that's really hell.

In history, Gu Yingxiang did not go home in time for the funeral because of the death of his mother, and was impeached and dismissed by the official. There was a delay for many years, because the Yunnan rebellion was uneven, and the imperial court recruited him back to patrol Yunnan, and finally the official went to the criminal department Shangshu, and was squeezed out and transferred to the Nanjing Criminal Department.

……

On the fifteenth day of the first month, the Lantern Festival, civil and military officials have a ten-day holiday.

Because of the rampant anti-thieves and the lack of money in the household department, a series of activities during this year's Spring Festival were simplified.

On New Year's Day (the first day of the first month), a banquet was given, but if it was not given, the officials went home to eat by themselves. The southern suburbs sacrificed heaven and earth, and originally planned to let Wang Yuan lead six thousand soldiers to appear, but now there is no big scene, and only the basic sacrificial etiquette is maintained. There is no official celebration of the Lantern Festival, and the curfew is only lifted that night, allowing the people to entertain themselves.

On the day of the Lantern Festival, Wang Yuan was just about to go out and go shopping with Song Ling'er, when Gu Yingxiang suddenly came to visit.

Gu Yingxiang carried a bag of gifts and said with a smile: "Bachelor Wang, during the Lantern Festival, you won't blame me for taking the liberty of disturbing, right?" ”

"Brother Weixian is polite," Wang Yuan hugged his fists and said, "The day before yesterday, my teacher mentioned that I also wanted to visit my brother. ”

Gu Yingxiang handed the gift to Wang Yuan and went straight to the point: "I learned about the arithmetic manuscript of the virtuous brother from my husband, and I really can't help but want to learn a thing or two. ”

"Please sit inside," Wang Yuan said to Zhou Chong, "You go to Mr.'s house and tell Ling'er, just say that I want to entertain my friends now, and then accompany her to visit the Lantern Festival Lantern Market in the evening." ”

Zhou Chong was ordered to leave, and Gu Yingxiang said apologetically: "It turns out that I delayed the time of the virtuous brother." ”

Wang Yuan smiled: "It's okay." ”

This gentleman is a pragmatist, and he doesn't like to waste his time.

Historically, at the age of thirty-five, he was appointed Dali Siqing, the president of the country's highest court. As a result, he resolutely refused to accept it, and actually went to work as a minister in Lingdong Province, just because the central department could not really do things. And because the Tianyuan technique (equation) is not easy to promote, when annotating the "Measuring Circle Sea Mirror", he deleted all the content of Tianyuanshu, which was criticized by later generations of mathematicians.

When he was serving as the secretary of the Criminal Department, he felt that the existing laws and regulations were too complicated, so he deleted and revised the "Da Ming Law" and wrote a book of "Law Solving Doubts" himself, so that judicial officials could quickly and effectively handle cases.

At this moment, Gu Yingxiang took out a stack of manuscripts and directly explained his intentions: "The equation created by the virtuous brother seems to be able to achieve more than five yuan?" ”

"Probably can, I haven't thought about it yet." Wang Yuan replied.

The word "equation" comes from the Nine Chapters of Arithmetic, and the first example problem is to solve a system of ternary equations.

As for "yuan", China has long had the technique of Tian Yuan, and the ternary equation can be called Tian Yuan, Earth Yuan and Human Yuan. Zhu Shijie, a mathematician in the Yuan Dynasty, also created the solution method of the quaternary higher order equations, which is called the "quaternary technique", and added the concept of matter after the three elements of heaven, earth and man.

The most interesting thing is that when the ancient Chinese were doing equations, they also had to combine the number of yin and yang. The solution of the quaternion equation is expressed as follows: "With the Yuan Qi in the center, the Heaven Yuan is one below, the Earth Yuan is one on the left, the Human Yuan is on the right, and the Matter Yuan is one on the top." Yin and yang rise and fall, advance and retreat, interchange and change, intricate. ”

The whole process is carried out using arithmetic chips, and those who know the root know that they are solving equations; I don't know the roots, and I think it's fortune telling.

It's so complicated that it can confuse anyone who studies math. Imagine for yourself how terrifying it would be to be able to use different calculations to express and solve quaternary higher-order equations.

It was for this reason that Gu Yingxiang thought that the "Tian Yuan Technique" was not very practical, and turned to delve into trigonometric functions. Now that he had read Wang Yuan's manuscript and seen the numerical expression of the equation, he was shocked and felt that this technique could solve countless practical problems.

The two discussed equations first, then quickly moved on to trigonometry, and then combined the two.

Based on his own research, Gu Yingxiang also used Wang Yuan's equation symbols to fully express theorems such as sine and cosine.

"Brother Xian, this method can be implemented for eternity, in order to get a glimpse of the truth of yin and yang!" Gu Yingxiang exclaimed.

Wang Yuan smiled: "What does it have to do with yin and yang? ”

Gu Yingxiang said: "The reason why heaven and earth are changing, and those who give birth to all things are just yin and yang. One yin and one yang, the interaction is intricate, and the changes are endless. The sage trapped the intricacies of his interactions, and put them into a mathematical measure to measure them. As a result, the profundity of heaven and earth, the entry and exit of the sun and the moon, and the secrets of ghosts and gods can all be known. ”

Wang Yuanluo stood up, took Gu Yingxiang's hand and said, "Listen to what you say, you and I are confidants and fellow believers!" ”

Wang Yangming's disciple of the mind is obviously an anomaly, and he actually wants to use mathematical methods to express and measure all things in heaven and earth. He also said that as long as he uses mathematics correctly, he can measure the height of heaven and earth, the entry and exit of the sun and the moon, and the secrets of ghosts and gods.

Wang Yuan no longer discussed mathematics with him, but deepened his understanding of the family. Therefore, I learned that this old man had once ridden alone to quell the chaos, and he had also learned swords, horsemanship, and archery, and he also had a certain understanding of the art of war.

The two discussed more and more things, almost nothing to talk about, and they couldn't wait to worship on the spot.

When it was dark, Song Ling'er came to Wang Yuan to turn off the lights, and then made an appointment to talk another day.