Chapter 60 Soil Disk Algorithm

From Tongzhou by boat through the Grand Canal, down to the south of the Yangtze River, and then from the south of the Yangtze River to Fujian, in Fuzhou from the collection of ships, soldiers, I am afraid that it will be several months before the development to Dongyong. In fact, Zhu Houhuang thought about taking a boat directly from Tianjin to Fuzhou, but the people around him dissuaded him. Without him, for many years, there is no official route from Tianjin to Fuzhou, and there is no big ship running from Tianjin to Jiangnan, if Zhu Houhuang wants to do this, it will take longer, because such a sailing ship is not easy to find, and even the sailing manpower is not easy to find, of course, the danger of navigation is also one of the reasons why everyone discourages it.

However, the reason why Zhu Houhuang agreed to go south through the canal was in cost.

It has to be said that the canal is the main artery of the entire Ming Dynasty. However, this artery is more transported from the south to the north, rather than from the north to the south, so a large proportion of the trough ships returning from the north are empty, and with Zhu Houhuang's identity, they can be forcibly requisitioned. However, after the incident of inadvertently forcing the craftsman to death, Zhu Houhuang had some sense of proportion in doing things and asked Wu Fengyi to do it.

Wu Fengyi is Zhu Houhuang's maternal uncle and Wu's younger brother, born in Jinyiwei, and has never been a good man and a woman. I know the doorway very clearly. Let him do it, and he will naturally be able to handle it clearly.

Wu Fengyi found a fleet of more than a dozen ships, took more than 2,000 people with her, and went south through the canal. Along the way, he entered the Shandong territory.

After entering the boundary of Shandong, Zhu Houhuang only felt devastated and miserable, although the rebellion of Liu Liu and Liu Qi had passed several years, but the rebellion of Liu Liu and Liu Qi had not been so easy to recover from the wounds left by the land of Shandong. Zhu Houhuang didn't have the mood to look at the scenery, he turned his head and found that Zhu Yu was sitting on the bow of the boat behind, with a straight bamboo pole stuck in the bow. Zhu Yu measured it from time to time, the length of the shadow of this bamboo pole, and he didn't know what he was doing?

Zhu Houhuang's heart moved, he took this group of astronomers and mathematicians very seriously. Secretly said: "There is nothing to do on the canal, so why not communicate more with these experts." Thinking of this, he immediately decided to change ships.

"Mr. Zhu, what are you doing here?" Zhu Yu didn't raise his head and said, "Measure the sun and shadow." ”

"What's the use of measuring the sun?" Zhu Houhuang asked.

"Usefulness? It's useless, you have to find something to do when you're idle. After Zhu Yu finished speaking, he felt that there was something wrong with his voice, looked up, and said, "Shizi? No. He immediately changed his tone and said, "Your Highness, you are here." ”

Zhu Houhuang could see that Zhu Yu's expression looked respectful, but between his eyebrows, a resentment lingered.

How can you not complain? Zhu Yu didn't know when he started, he already wanted to create a calendar, because the Ming calendar was not accurate, and it was not a day or two. Moreover, the Ming calendar traces back to its origins, which is the Hijri calendar, rather than the inheritance of the ancient Chinese calendar. Zhu Yu was born in an astronomical family, and he wanted to create a calendar far beyond the Hijri calendar, so that future generations could also praise his name and become one of the world's famous calendar masters.

The more accurate the calendar, the more dependent it is on large-scale astronomical measurements. There is no accurate measurement, and an accurate calendar is not a fairy tale, but a myth.

Even if Zhu Yu worked in the Qin Heavenly Prison, he could not create such a calendar.

And easily, Emperor Zhengde is ready to rebuild the calendar, but this is just the beginning. This King Yong actually pulled him away and let him pass by the most hoped feats. How could he not have resentment, but because of Zhu Houhuang's identity, he had to hide this resentment in his heart.

"Your Highness." A voice came from behind Zhu Houhuang, and he looked back. It was a young man, who looked to be only in his twenties, and he said: "Chenbei Shangqing, I just don't understand, how does His Highness know about the Tupan algorithm?" ”

"Dirt disk algorithm?" Zhu Houhuang was a little strange and asked, "What is the soil disk algorithm?" ”

Pei Shangzhi is the son of the Pei family in Nanjing, and he is also the grandson of Bei Ren who participated in the revision of the calendar this time. He was afraid that Zhu Yu would anger Zhu Houhuang and find a topic to attract Zhu Houhuang's attention. He said: "Isn't the text that Your Highness asks us to transcribe every day just the Tupan algorithm?" ”

Zhu Houhuang was taken aback and said, "What? He crouched down and wrote 123456789 on the board with his fingers. said: "Is this all a dirt disk algorithm?" ”

After Bei Shangzhi looked at it, he said, "This is it." ”

"Tell me, what is the soil disk algorithm?" Zhu Houhuang asked with interest.

"Yes." Bei Shangzhi said: "Speaking of the soil disk algorithm, I have to mention Mr. Da Test. Mr. Da Test is back, originally from the Song Dynasty to the court. The Hijri calendar and the earthen disk algorithm were dedicated to Taizu. Taizu was overjoyed, so that Mr. Da Test entered the Qin Heavenly Prison, and immediately returned to the Qin Heavenly Prison, and later returned to the Qin Heavenly Prison and withdrew, but among the Qin Heavenly Prison, there was still a Hui Hui Department. And the thirteenth princess. ”

Zhu Houhuang slowly understood that the so-called soil disk algorithm is a column-vertical type, without calculation, and this algorithm, as part of the knowledge of returning to astronomy, was introduced into Middle-earth by this Mr. Da Test in the Hongwu period. This algorithm is almost no different from modern junior high school and primary school mathematics. Look at this Mr. Daxue, with this soil disk algorithm, that is, the current junior high school and primary school and other mathematical knowledge, you can still be a princess, isn't it another one who learns mathematics, physics and chemistry well, and is not afraid to go all over the world?

It's just that this Mr. Da Test encountered the same thing as Zhu Houhuang.

Although Mr. Datest's algorithms are very good and advanced, the problem is that our arithmetic since ancient times is not bad. Why do you want to use your set? Therefore, when this Mr. Datest was here, the soil disk algorithm was still popular, but as soon as this Mr. Datest was gone, the soil disk algorithm was shelved.

The greatest contribution of the ancestor of the Pei family, Belin, in astronomy is the sinicization of the Hijri calendar, that is, the knowledge of Arabic astronomy, and his book is "Seven Steps to Push the Government". Many of the contents in it are translated from Arabic astronomical knowledge, such as the famous Saint Seiya, then this constellation, that constellation, are all translated from Belin.

Therefore, Bei Shangzhi can also be regarded as a family history. I know these things better than Zhu Yu.

Zhu Houhuang's heart moved, and he said: "Mr. Bei, you can organize a set of teaching materials for the soil disk algorithm. When I arrived in Dongyong, this is the arithmetic standard of my Yongguo. ”

"What?" Zhu Yu said angrily: "The Celestial Empire itself has everything, Your Highness wants to learn arithmetic, since you can start from the ninth chapter, why bother to learn those things that are unscathed?" ”

Zhu Yu cares very much about Huayi's discrimination. He wanted to study the calendar and create a perfect calendar, not only for the sake of the world, but also secretly wanted to breathe a sigh of relief for his predecessors.

Since the Nine Ruling Calendar, the Tianzhu calendar, the Hijri calendar, since the introduction of the Central Plains, the Central Plains calendar has gradually had an Arabic color, not to mention that the Ming Dynasty is used to the present, that is, the Hijri calendar inherited from the Yuan Dynasty. Zhu Yu, as a Ming person, felt very uncomfortable. After all, the calendar is a political issue related to a country's integrity, and it is really uncomfortable to use the Hijri calendar on this issue, especially since Zhu Yu said as a descendant of an astronomical family.

At the beginning, Zhu Houhuang wanted Zhu Yu to teach him astronomical algorithms in Arabic numerals, but Zhu Yu really didn't know? No, he just didn't want to say it. At this moment, I heard that Zhu Houhuang actually used Arabic numerals instead of traditional arithmetic, and I couldn't help but feel heartbroken.

Although Yongguo, even if it is well developed, it is only a small country. But Zhu Yu didn't allow this to happen in front of him.

"Your Highness, although the soil disk algorithm is simple, it can be incorporated into our country's algorithm, what is the difference between the calculation code and the number of scales? Why bother to sacrifice China? Zhu Yu's voice was full of emotion, and he looked confident. Let Zhu Houhuang not know what to say for a while.

Bei Shangzhi was shocked when he saw this, for fear that Zhu Houhuang would be angry, he hurriedly grabbed Zhu Yu and said, "Chen Jin has given orders, but I need Brother Zhu's help." I also ask for your forgiveness. As he spoke, he saluted again and again, and pulled Zhu Yu into the cabin quickly. Zhu Houhuang couldn't catch up.