A Teacher for All Ages: Starting with Taking Emperor Wu of Han as a Disciple

The author seems to feel that the level of mathematics in the Han Dynasty is still stuck in the Xia and Shang Dynasties, and is trying to use elementary school application problems to slap in the face the highest level of mathematics talents in an empire. This plot is not only lame but also poisonous. The protagonist's level of showing off is just enough to fool the ignorant and unskilled nobles. Do you want a talent who represents the highest level of mathematics in the empire to be astonishing? That's it? At least you have to come up with the complete algebraic system and the binary root finding formula to calm the situation. In fact, the Han Dynasty was a period of highly developed mathematics and arts. Zuo Yan's Yin-Yang theory penetrated into all disciplines. God-making movements arose in society, idolizing Confucius, Confucian prophecies, and Confucian alchemists. Confucianism in the Han Dynasty would lead to good or bad fortunes when encountering problems. Even the emperor believed in celestial phenomena, talked about disasters, and studied prophecies. At the end of the Han Dynasty, society was shrouded in a mysterious atmosphere. In this way, the study of Xiangshu in Zhouyi reached its peak in the Han Dynasty, and the related mathematics also flourished. During the reign of Emperor Cheng of the Han Dynasty, he ordered Liu Xiang, the official of Guanglu, to check the classics and other books of various scholars, Ren Hong, the infantry captain, to check military books, Taishi ordered Yin Xian to check mathematics, and Li Zhuguo, the attendant doctor, to check Fang skills. Later, Liu Xin, the son of Liu Xiang, collected the books and divided them into "Seven Strategies", including Zhuzi Lue, Liu Yi Lue, Poetry and Fu Lue, Military Book Lue, Shu Shu Lue and Fang Ji Lue. Shu Shu Lue seemed to have become a major category in the Han Dynasty academics and Zhuzi. "Book of Han·Yiwenzhi" says: "Those who work on mathematics are all in the positions of Mingtang, Xihe, Shi, and Divination." This shows that mathematics and mathematics are actually the inheritance of ancient shamanism and history. "Historical Records: Biography of Ri Zhe" records that the academic circles of the Han Dynasty were divided into the Five Elements Family, the Kanyu Family, the Jianchu Family, the Congchen Family, the Li Family, the Tianren Family, the Taiyi Family and the Xingfa Family. "Hanshu Art Chronicles" further divides the books of magic numbers into six categories: one astronomy, two calendars, three and five elements, four turtles, five miscellaneous fortunes, and six forms. It can be seen from this that the scope of mathematics in the Han Dynasty was wider, and Zhou Yixiang's mathematics became the mainstream of Yi studies. It was not only studied by Taoist schools and alchemists, but also by Confucian doctors who studied the Five Classics. The astronomy and calendar science was very developed in the Han Dynasty, and the revised quarter calendar, Taichu calendar, and Qianxiang calendar were all completed in the Han Dynasty. In the era before Emperor Wu of the Han Dynasty, outstanding mathematical achievements had already appeared in ancient China: During the Spring and Autumn Period and the Warring States Period, mathematical knowledge had far exceeded the level of counting from 1 to 3000. At this stage, they began to cultivate and sow seeds in the fields of arithmetic, geometry, and even modern applied mathematics. Arithmetic field-the four arithmetic operations were established. The formula for multiplication appears in some writings. Score calculation - began to be used in planting land, distributing food, etc. In the field of geometry - the Pythagorean theorem appeared. Algebra field - the concept of negative numbers sprouts. The most noteworthy thing about this period is the arithmetic and the decimal system. When history advanced to the Qin and Han dynasties, ancestors used brushes to write down things that needed to be remembered on pieces of bamboo or wood, which were called "slips" or "slips." It can be seen from those Han bamboo slips that during the Qin and Han Dynasties, there was a significant increase in multiplication and division calculations in arithmetic, and multi-step multiplication and division methods and the nine-nine multiplication formulas that tended to be complete appeared. In terms of geometry, you also have the knowledge of calculating the area and volume of a rectangle. The contention of a hundred schools of thought during the Warring States Period also promoted the development of mathematics. Some schools also summarized and summarized many abstract concepts related to mathematics. If you don't care about ancient Chinese mathematics, don't read the original classical works, don't study ancient mathematicians, and don't understand the work of researchers on the history of Chinese mathematics, then of course there was no mathematics in ancient China in your mind. There is also the nine-nine multiplication table. This is not an ancestral craft that each family brings to the coffin board. Cultural relics show that the 20 times 20 number table during the Warring States Period was already a common calculation tool. There are three bamboo slips in the Qin bamboo slips that record the nine-nine multiplication formula. In addition to the familiar multiplication from one to nine, there is also the division operation of "two and a half to one".

I saw you said that the two labor-saving wheels on the modern competitive recurve bow can increase the pulling force. Is it really because you have read too many marketing accounts? That's called a labor-saving wheel. Do you understand that it saves effort? Moreover, it saves effort when the draw distance is drawn to the maximum, so that athletes can better find the target. Moreover, for a bow with the same draw force, a recurve bow with wheels requires more force to draw. The plots I have seen have too many flaws. You can teach the prince a lesson casually, and everything is fine. The emperor can come to see you? That was Liu Qi, Emperor Jing of the Han Dynasty, the famous sixth son in history. Among the many emperors of the Han Dynasty, his city government was only a little less than that of his father. How could the other emperors of the Han Dynasty, except for Emperor Khan Zhao, be comparable? In that political background where there are many powerful people, surrounded by relatives, nobles, vassals and foreign enemies, why is Emperor Jing crazy enough to take the protagonist so seriously? The first thing people think of is which force the protagonist is testing the emperor's reaction to, instead of seizing the opportunity to hug the protagonist's lap: What do you want to do? Is he a spy? What are your political demands? Are you going to rebel? As for what you say, I won't believe a word of it unless you can be the emperor's white glove like Zhidu. The same goes for other forces. No one is a fool. The ancients just didn't have as much knowledge as we do, but they are not stupider than us.

There are multiplication tables in the Qin bamboo slips. Where do you get your irrationality and sense of superiority from?

If readers point out mistakes and still use arrogant words, the things written by such people may not be any better.

No one who is illiterate in history dares to write historical novels. Just go home and study for a few years and then become a national teacher.

I am very speechless. This slap in the face is probably from ancient times 20 years ago. Many people have said, don't make any multiplication tables. I really think that our ancestors are just like the author and know nothing! During the reign of Emperor Wu of the Han Dynasty, the powerful dynasty had already sent envoys to establish diplomatic relations with Eastern Rome. Do you think it was the arrogance of South Korea? At the very least, you have to figure out high-order equations and calculus before you can impress the ancient math masters.

There is no optimal solution to the system, only the most suitable system. Another delusional system that beats the ancients

Not recommended. Looking at the book title introduction, you can see that there are no highlights. History teacher? Fortunately, I traveled through time, otherwise I would have been scolded for "misleading people." With a little Baidu, Liu Che won't look like a kid next door. He ran schools, he fought against the Huns, and he only respected Confucianism. Apprenticeship? Not beating the teacher to death is considered special treatment. Most of the outstanding emperors in history were centralized and autocratic, which is nothing. Why do you think Liu Che got scolded?

I want to give up the book after reading the first chapter. It is not surprising that the multiplication table appeared in the Han Dynasty. It is recorded in the bamboo slips unearthed in the Qin Dynasty. China's mathematics truly fell behind the West in the Ming Dynasty.

How does the author interpret the view that only when the Han Dynasty was strong did the Huns become strong and united?