His name is Liu Hong. Pen "Fun" Pavilion www.biquge.info

Liu Hong and Liu Yuanzhuo, a native of Taishan County, Qingzhou.

With Liu Zhang's understanding of the characters of the Three Kingdoms, the smartest is of course Zhuge Xiaoyou. After Zhuge Xiaoyou, of course, it is the inventor Ma Jun.

In addition to these two, it is more likely to be the legendary Huang Yueying.

Again..., Liu Zhang couldn't think of it at all.

Zhuge Little Demon has a series of awesome inventions such as Zhuge crossbow, wooden ox flow, horse Kong Ming lantern, etc., of course, it may also be that his wife helped him get it together, so they don't know if their husband and wife are smart.

Ma Jun is also very good, invented the waterwheel, improved the loom, etc., and is also a big cow.

It's a pity that Zhuge Little Demon hasn't appeared yet, where is Ma Jun?

The little demon and Ma Jun didn't appear, but a big demon came.

The big demon is Liu Hong.

The big demon Liu Hong, after coming to the stage, simply saluted Liu Zhang, and didn't say anything, he went directly to the blackboard, and then brushed to write and paint, and then got a blackboard, which directly stunned Liu Taishou. I rely on this guy is also a time-traveling person, how can I get out the advanced mathematics of three-dimensional geometry, this thing is not my strong point, you let me make a program to make a little virus I can also compare twice, you directly test my mathematics, isn't this to KO me directly. If it weren't for the fact that Liu Dayou wrote all ancient numbers and ancient formulas, and used ancient mathematical terms, Liu Zhang really thought that the senior brother of the mathematics department had crossed over. Of course, it was these ancient formulas and terms that caused Liu Zhang's life.

Liu Zhang really wanted to admit defeat directly to Jinzi. The problem is, such a big demon is hard to find, and the big demon who directly admits defeat looks down on you, let alone think about soliciting, Liu Zhang is basically not a fart now, why are others so awesome to mess with you. Liu Zhang must show enough real skills.

In the morning, Liu Hong and Liu Zhang basically talked about chickens and ducks, Liu Zhang didn't understand what Liu Hong was talking about, and everyone below had already listened to it drowsy, but seeing that Liu Zhang just refused to admit defeat to Jinzi, they scolded Liu Zhang for being a shameless villain, a miser, and so on. Liu Zhang didn't care so much, he didn't rest at noon, and he didn't care if there was anyone in the audience, so he sent some food over, and after using it briefly, the two continued to fight again against the sun.

When he fought again, Liu Zhang had already thought of a countermeasure, that is, everything was based on me.

The first question written by Liu Hong is similar to the problem of chickens and rabbits in the same cage, and the solution given by Liu Hong is also very simple, that is, a binary linear method group, because it is written about ancient calculations and numbers, so Liu Zhang was confused for a long time.

This problem is simple, Liu Hong's solution is also very correct, it is the addition and subtraction method used, that is, by multiplying and dividing the equation, a variable of the two equations becomes the same, and then the two equations are subtracted, and there is only one variable left, so that the value of this variable is obtained, and then the value of another variable is obtained.

After Liu Zhang knew Liu Hong's algorithm, he directly wiped Liu Hong's solution, and then wrote his own modern solution. Similarly, for a system of binary linear equations, Liu Zhang uses a modern typical substitution method to write the answer in three or two clicks. Just kidding, this is the knowledge of elementary school students at most junior high school students, and Liu Zhang is ashamed that he has been tossing for so long in the morning.

The second problem is to calculate the area of an arc-shaped arch. This Liu Hong's solution is very complicated, and it adopts a very cumbersome method of cutting the circle. The arch is divided infinitely by the circumcision method, and then all the triangle areas divided are added to the limit sum. After Liu Zhang figured it out, he was completely convinced, the limit is summed, this is definitely a fucking thing in high numbers, Liu Hong, you are too awesome, isn't it just the area of an arch, it's all a regular body, and it's not an irregular body, just use the area of the fan to subtract the area of the triangle below, isn't it the area of the arch above, as for you to play me with knowledge like calculus.

Liu Zhang directly wiped Liu Hong's solution, and then wrote his own solution. Lao Tzu didn't give it for nothing, this kind of junior high school knowledge is not difficult for me.

The third problem is to calculate the volume of a cone.

Liu Hong obtains that the volume ratio of the tetragonal cone and the cone is 4/pi, and then the volume ratio of the tetragonal cone and the cube is 1:3, and the volume ratio of the conical table and the cylinder is 1:3. Although Liu Hong's solution is correct, a bunch of obscure terms make Liu Zhang want to die and be miserable.

The fourth problem is to calculate the volume of a sphere.

On the basis of the volume of the cone, Liu Hong put forward another idea, that is, the famous "Mouhe square cover" in mathematics. The so-called mou square lid is to intersect two identical cylinders vertically, and the intersecting part is the mou square cover. If you cut the square lid along the horizontal plane, each layer is square.

Liu Hong's idea is that if a sphere is nested in the Mou square cover, and then cross-cut, then each cross-section is a square embedded with a circle, so that the volume ratio of the Mou square cover and the sphere is 4/pi, and if the volume of the Mou square lid can be obtained, the volume of the sphere can be obtained.

Liu only put forward an idea, but did not derive a specific calculation formula.

Although it was only an idea, Zu Chongzhi's son Zu Xuan, on the basis of Liu, finally studied the correct formula for the volume of the sphere.

Liu Zhang directly wiped Liu Hong's solution and the imaginary brush, and then wrote his own solution with the brush, and then patted the dust on his hand and stood proudly. Just kidding, it's just the three-dimensional geometry of high school, and the little one died. Liu Zhang wants to use enough arrogance to suppress the ancient demon in front of him. Fortunately, it's just an ordinary big demon, not a big demon of Zhang Heng's level.

Liu Zhang also told Liu Hong very arrogantly that his algorithm can be verified by reality, and the verification method is very simple, that is, in a container filled with water, and then put it into a cone or sphere, and the volume of the sphere can be obtained by discharging the volume of water. This can be corroborated with the measured results and the calculated results.

Damn, Lao Tzu is from science and engineering, and he has been tossed by such a rudimentary problem for almost a day, and Liu Zhang has been tossed crazy by the big demon Liu Hong. You have to put on a strong push.

Liu Hong was indeed shocked.

Liu Zhang explained Arabic numerals, modern addition, subtraction, multiplication and division to him, and he understood. Liu Zhang's algorithm is also concise and accurate.

Truth is often simple and beautiful, and it is this beauty that mathematicians pursue, the ultimate beauty, the beauty that ordinary people cannot understand.

Modern calculations are simple and clear, easy to understand and deduce, and Liu Hong is deeply attracted by this kind of calculation. It was difficult for him to understand how a child of an official eunuch like Liu Zhang could have such a whimsical idea, which was to systematize some messy, complex and obscure arithmetic. It's definitely a genius change.

Liu Hong is actually not an ordinary person, he can be regarded as Liu Zhang's fellow clansman. He is the elder brother of Emperor Guangwu Liu Xiu, a descendant of Liu Yin, and his blood relationship is closer to today's son. However, the two abandoned their secular relationship and only exchanged academics.

Most of the scientists are freaks, and in order to show his sincerity, Comrade Liu Hong presented Liu Zhang with his latest invention and abacus. More than 1,800 years ago, the earliest calculator in human history. Countless years earlier than in the West. Of course, Liu Hong's achievements are much more than that. He was a famous mathematician and astronomer, a sage of arithmetic, and a scientific demon who was able to accurately predict solar and lunar eclipses 1,800 years ago.

Liu Zhang didn't know that Liu Hong was such a cow, Liu Zhang only knew that as a witness to the great history of mankind at this moment, he was so excited that he didn't know what to do, and immediately gave back two large boxes of gold. He then tried to hire Liu Hong as the dean of the academy of sciences and the president of the university.

Liu Hong, as a generation of scientific demons, of course, could not be moved by gold and silver, only symbolically took a piece, and symbolically took a piece as Liu Zhang's advance remuneration, Liu Hong also insisted on rejecting the position of dean and president, saying that he would only be obsessed with science, and could engage in research and teaching in the Academy of Sciences and universities, and would not pay attention to secular government affairs.

Liu Hong is another major gain for Liu Zhang after the two miracle doctors.

Although Liu Zhang said that medicine is the first of a hundred schools, he also knows very well that mathematics is the basis of all scientific theories. Even traditional Chinese Confucianism is based on mathematics.

I Ching is the source of Confucianism, the first of the group classics, the book of teaching, and the foundation of the I Ching is mathematics. Yin and yang are zero and one, and Bagua is the binary representation of zero and one, and the eight hexagrams represented by this binary, arranged and combined in pairs, are 0 to 63 of the sixty-four hexagrams. 0 is the kun hexagram, and 63 is the qian hexagram. Each hexagram has six changes, that is, the change in the number of days of 384 weeks.

In fact, the real purpose of Liu Zhang's World Heroes Association is to attack and destroy traditional Confucianism, and to pull the wisdom of people in this era back onto the road of normal scientific research. This kind of thing, if you can't do it alone, you need a large number of people like Hua Tuo, Zhang Ji, and Liu Hong to complete it together.

In this era, there are very few truly pure scientific talents, and they are precious, otherwise Liu Zhang would not have promised heavy benefits to grassroots and marginal scientific research workers like Granny Wei and Yuan Laohan.

Liu Zhang has always been worried about Ma Jun because Ma Jun is the only one he knows, an inventor in the Three Kingdoms period. Zhuge Xiaoyou also has inventions, but he is not a pure inventor. Liu Zhang couldn't even imagine that he had brought Zhuge Xiaodemon here, but let him only engage in research and invention.

It is easy for thousands of troops to get, but it is difficult for one general to ask for it.

In two words, talents are rare.

Chang'an City, shops in Shuzhong.

The shopkeeper was taking stock of the accounts when a voice sounded.

"The one in charge of the shopkeeper, I will take a pot of wine."

"Here you go, get the money, kid."

"No, no, don't want this, you want that Jian Nanchun."

"Love or not, Jian Nanchun doesn't."

"You, you, you deceive and deceive people, he and he they say, I, I, I come, you will give Jian Nanchun."

"Who told you?"

"Then the old gentleman over there said it."

"Oh, what did that old gentleman say to you?"

"He, he, he said, I just need to tell you my name, you will give me, me, Jian Nanchun."

"And what's your name?"

"I, I, my name is Ma Ma Jun."

"Ma Jun? Which horse which jun? ”

"Horses, horses, horses

"The name is right, but how do I know if you are really Ma Jun, child."

"I, I, I'm Ma Ma Jun."

"It's not impossible if you want wine, I don't have any goods here, if you want it, you can only go to Chengdu."

"I, I don't know the way."

"That's okay, our caravan is going back to Chengdu, you can join our caravan."

(Liu Hong here is a combination of the achievements of Liu Hong and Liu Hui, which is hereby explained.) Because he didn't pay attention when he started writing, he wrote Liu Hui's mathematical achievements on Liu Hong's head, and then he simply made a mistake.

Liu Hong (about 129~210 A.D.), the character Yuan Zhuo, a native of Mengyin County, Taishan County, Eastern Han Dynasty (now Mengyin County, Linyi City, Shandong Province), a descendant of Liu Xing, King of Lu in the Eastern Han Dynasty, an outstanding astronomer and mathematician in ancient China, the inventor of abacus, and was respected as a "sage of arithmetic" by later generations.

Liu Hui (c. 225-295 AD), Han nationality, a native of Zouping County, Shandong, was a great mathematician during the Wei and Jin dynasties and one of the founders of classical Chinese mathematical theory. )