The courtyard where Xiong Wencan was received is now used to receive important guests, and a maid is hired to clean it.
Six scholars came today, including Xiao Shixuan, who are all mathematics enthusiasts.
Since Xiao Shi was given a doctorate in mathematics and was paid according to the salary of a county magistrate, everyone knew that Zhao Han attached great importance to mathematics. What was good at the top was effective at the bottom, and more and more people were studying mathematics.
However, most scholars are still at the elementary school mathematics level.
"Mr. Zhao!" The six scholars stood up in unison.
Zhao Han smiled and raised his hand: "Everyone sit down."
After everyone sat down, they looked behind Zhao Han, but Zhao Zhenfang followed.
There was a blackboard erected in the center of the yard, and everyone sat on chairs around the blackboard.
Zhao Han came to the blackboard and said: "You are all outstanding researchers in mathematics. Today, I invite you to come. The first thing to do is to establish a mathematics society. This mathematics society is similar to the literary society. We usually communicate and discuss mathematical problems. Everyone
Publish a journal "Mathematics" quarterly to publish the results you have achieved recently. This year, the General Military Office has allocated twenty taels of silver as a special fund for the establishment and development of the Mathematical Society."
The six people were quite happy. They were all outliers among scholars, and they did not expect to receive such attention from Zhao Han.
"You guys go down and discuss the details of the Mathematics Club slowly." Zhao Han picked up the chalk made of chalk. "Today we are going to talk about two things, one is logarithms and the other is analytic geometry."
As a liberal arts student, Zhao Han has forgotten most of his high school mathematics, and has also forgotten many contents of junior high school and high school.
Analytical geometry must be learned in junior high school, while logarithms are knowledge required in the first grade of high school. For these two things, Zhao Han only remembers the basic concepts. If he wants to go deeper, he has to rely on Xiao Shixuan and others to study them.
Zhao Han couldn't wait any longer. He had to come up with the basic concepts, otherwise it would not be born in China until the Year of the Monkey and the Moon of the Horse.
Because logarithms and analytic geometry are very important and are key mathematical tools for the development of astronomy, navigation, machinery, economy, military and other technologies. In other words, it is the development of astronomy, navigation, machinery and other fields that forces the improvement of digital calculation methods.
This gave rise to logarithms and analytic geometry in Europe.
Without these two mathematical tools, the development of astronomy, navigation, and machinery would reach a bottleneck that would be difficult to break through.
Just this year, Descartes also developed the concept of imaginary numbers.
China was far behind at this time, but the emergence of Zhao Han narrowed the gap. The equal sign appeared in Europe more than 90 years ago, but it was not popularized until more than 40 years ago. The greater than and less than symbols appeared in Europe 36 years ago; 6 years ago
, the multiplication sign and the division sign appeared in Europe; this year, Descartes used the radical sign for the first time.
At least the mathematicians under Zhao Han used the radical sign before European mathematicians.
Also this year, Descartes founded analytic geometry!
Zhao Han drew a cross coordinate system on the blackboard. The horizontal column marked the abbreviation symbol of "A", the vertical column marked the abbreviation symbol of "B", and the intersection point was marked "0".
Did you suddenly have an impression?
This thing is analytic geometry, and it will be everywhere a few hundred years later, but now it is something new.
As Zhao Han used chalk to draw strokes one by one, the six scholars were all surprised and delighted, as if the door to a new world had been opened.
The more Zhao Zhenfang listened, the more confused she became, as if what was written on the blackboard was a heavenly book. She looked at the six people next to her, and they all seemed to be paying attention, as if they could all understand.
Zhao Zhenfang feels that she is so weak and will have to work hard to study mathematics in the future.
Because she felt bored at ordinary times, she asked her brother for a job to do something in the mathematics society. For example, she helped contact members, organize research successes, edit the quarterly journal of mathematics, etc.
If she can't even read other people's work, how can she edit the journal?
Throughout the morning, Zhao Han only talked about the most basic things, mainly because he didn't know how to talk too deeply. He threw down the chalk and said: "Everyone, please stay for dinner. I have official duties in the afternoon. Farewell!"
"Congratulations to Mr. Zhao!"
The six people stood up and bowed together. Then no one went to eat. They all took out their small notebooks and read through them.
"Do you understand?"
“I understood everything, and it was like an enlightenment.”
"Especially the introduction of this variable is a stroke of genius. Many previous problems can be easily solved!"
"Mr. Zhao is such a god!"
"..."
The six people sighed there and then started discussing.
In fact, the content they discussed was all mathematics for the third year of junior high school and the first year of high school, and it was relatively simple among them. They were not qualified to take the big questions in the final exam.
Zhao Zhenfang jumped up to catch up and asked: "Second brother, can I learn mathematics from them in the future?"
"Okay, as long as you have something you like to do." Zhao Han said with a smile.
As the brother and sister stepped out of the courtyard, a guard handed over a letter: "In the main town, the farmers in Jianchang Prefecture are also in revolt. Zhao Bingyuan (Fei Ruhe) asked whether to send troops to take over."
Zhao Han didn't bother to eat, so he went back to the office first and asked his secretary to write a few transfer orders. He signed and sealed them with his own hand, and then returned to the inner house after sending them out.
There was also a vassal king in Jianchang Prefecture, called King Yi, and his ancestor was the sixth son of Zhu Jianshen.
This series has quite a reputation and is not easy to mess with.
The first generation of King Yi was very frugal, with few concubines and simple burials. His eldest son and second son were equally frugal. The eldest son left no heirs, so he passed the throne to his second son. The second son had five sons and asked for a reduction of 2,000 shilumi.
But these five sons gave birth to eighty-six grandchildren!
By the Chongzhen period, there were forty people in the Yiwang lineage alone at the level of county kings, as well as countless generals and lieutenants.
They do have a virtuous reputation because they never make trouble, but the people of Jianchang Prefecture don't think so. Like Raozhou Prefecture, there is no whipping law here, and Zhang Juzheng cannot control Jianchang Prefecture during the reform.
Jianchang Prefecture suffered from floods and drought this year, and the Nanfeng religious bandits have resurfaced. The uprising in Nangan next door is booming, and a farmers' association is being established in Fuzhou next door. How can the people of Jianchang Prefecture not follow suit?
Now, Nanfeng County is occupied by the Tantric Cult, and Fucheng is occupied by the peasant uprising army.
The Tantric Sect has also gone to Guangchang County to preach. It will definitely be the number one enemy of the peasant association in the future. This kind of folk sect must be resolutely attacked!
"Have you encountered trouble again? You just came to eat now." Fei Rulan asked with a smile.
Zhao Han said: "There is trouble in Jianchang Mansion. We must take it down in advance, otherwise we don't know how many people will die."
Fei Rulan said: "Uncle Lin and Mrs. Ling came here in the morning, and they told Fei Chun about the marriage. They will get married at the end of the year, and the date has been chosen."
"Which family does the bride belong to?" Zhao Han asked casually.
Fei Rulan said with a smile: "I know you don't like to get involved with rich families. She is the daughter of an old master from the village school. I heard that she looks good and is literate. She is also a good female matchmaker. I don't know how many matchmakers come to my door."
"That boy is lucky." Zhao Han also laughed.
Fei Rulan suddenly said: "Rumei and Zhenfang have reached the age of marriage, shouldn't they consider it?"
Zhao Han shook his head and said, "Don't worry, I'm only fifteen or sixteen years old. Getting married too early may cause difficulty in giving birth."
"My mother is very anxious and is already looking for Rumei's in-laws," Fei Rulan said.
Zhao Han smiled bitterly: "Don't think about these things all day long, just find something else to do."
Fei Rulan said: "I have something to do. The teachers at the Sweeping Eyebrow Girls' School are all married and talented women. I often correspond with them and chat about literature, music and art."
Zhao Han thought for a while and said, "If you like, you can also go to a girls' school to be a teacher."
"Can I do it too?" Fei Rulan's eyes flashed.
Zhao Han said: "If you are too busy, you can only go for half a day. You will be at home in the morning and work as a teacher in the afternoon."
"That's great!" Fei Rulan became happy and cheered for joy, as if she had returned to her girlhood again.
Zhao Han always felt that Fei Rulan was a little bored and was mostly free at home. It would be nice to go out and do things in the future. If he really conquered the world in the future, it would be difficult for him to go out, and he would definitely be opposed by the officials.
After lunch, Zhao Han hugged Fei Rulan, took a nap, stretched and continued to work.
After processing a few official documents, a secretary sent information: North Korea surrendered to the Qing Dynasty.
During the first month of the year, Huang Taiji sent troops to North Korea, and they marched all the way to the gates of Pyongyang. The North Korean king was frightened and fled to Namhan Mountain with his eldest son and hundreds of officials, and asked his second son to take the royal family to take refuge in Ganghwa Island.
The Ming army received the news in February and went to sea for rescue in March. Before the reinforcements arrived, they received news that North Korea had surrendered to the Qing Dynasty.
This year, the whole country has been in chaos, with bandits everywhere. North Korea's surrender actually caused no disturbance. It was only now that Zhao Han received the news.
Zhao Han called Pang Chunlai and Li Banghua and brought out the secret letter from North Korea to surrender to the Qing Dynasty.
Pang Chunlai frowned and said, "The Ming Dynasty is in danger."
"We must occupy the entire territory of Jiangxi in advance." Li Banghua suggested.
A few years ago, the Manchu Qing Dynasty had surrendered Mongolia, and now it has surrendered North Korea. This means that there are no constraints on the left and right. In the future, they can attack the Ming Dynasty with all their strength, and they will definitely be more fierce every time!
Pang Chunlai and Li Banghua both panicked, fearing that Beijing would not be able to hold on.
It is true that the situation this year is too scary, and disasters have occurred in most of China. The drought in southern Zhili and Zhejiang dealt the heaviest blow to Chongzhen, and its influence far exceeded Zhao Han's uprising in Jiangxi.
The taxation of the Ming Dynasty was entirely supported by Nanzhili and Zhejiang!
Zhao Han said: "Jianchang Fucheng was occupied by the rebels, and Nanfeng County was stolen by religious bandits. I have ordered the army, officials and farmers' associations to take action in advance."
"It should be like this," Li Banghua said. "We must capture Jianchang Prefecture, Fuzhou Prefecture, and Ruizhou Prefecture this year. In this way, only Nankang, Jiujiang, and Guangxin Prefecture are left in Jiangxi. We will strive to occupy all of Jiangxi after next summer's harvest.
territory."
"I agree with this strategy." Pang Chunlai immediately agreed.
Pang Chunlai came from Liaodong and knew how ferocious the Tatars were. North Korea's surrender gave Pang Chunlai a sense of crisis, fearing that the Tatars would suddenly capture Beijing one day.
By that time, if Chongzhen moves south and controls the river with the Tatars, Jiangxi will become a thorn in the side of the imperial court.
Jiangxi must be captured as soon as possible, and then Fujian, Guangdong and southern Huguang. In this way, Chongzhen will definitely not dare to go south.
