Seeing the round-faced young man Ye Mengqiu opposite, he looked stunned, but when he came back to his senses, he solemnly walked to the blackboard and read the question carefully, and then thoughtfully wrote on the other blackboard What is Tianyuan Yi for a certain ...... Lu Saburo couldn't help but sneer.

Still pretending to use the quaternary technique to solve the problem? When I don't know what the arithmetic world is like these days, is it?

You know, as the first head of Jiuzhangtang, I have endured a lot of hardships. The teacher didn't have time on his side, so I went to find the ancestor Ge Yong, in order to really study the ten books of arithmetic, because although he claimed to have read through the "Nine Chapters of Arithmetic" at a young age, in fact, with his original level, there was still a little distance from the level of understanding every question in the nine chapters of arithmetic.

As for the other nine of the ten books of the Sutra, such as the "Fixation", which has been lost, where did he go to school? Even the "Ancient Calculations", to his former level, is far from it. So, Zhang Shou didn't talk about these old clichés in Jiuzhang Hall, he often went to Ge Yong's side to study hard at night, learning from Tianyuan Technique to Quaternary Technique, but found that Ge Yong was only a little superficial!

I think that at the beginning, after seeing the first copy of Zhu Yuanjie's "Four Yuan Jade Jian" in the Yuan Dynasty at Ge Yong's place, there was a time when he was shocked by Zhu Yuanjie, who invented the Four Yuan Technique, but he only hated this arithmetic master for being vague.

However, when he went to Zhang Yuan to see Zhang Shou in private sometime, he got a new volume of the manuscript of "Ge's Arithmetic New Edition" in Zhang Shou's study. The main content is the elimination method of solving quaternary higher-order equations that is easier to understand but somewhat similar to quaternion. If he hadn't secretly studied with Ge Yong before, the little fat man would really think that Zhang Shou's book was written by Ge Yong.

But just because Ge Yong had lamented that Tianyuan and Quaternary were too difficult to understand, he mentioned to him that using the series of numeric symbols in the "New Edition of Ge's Arithmetic" should be able to simplify the Tianyuan and Quaternary Arts, which ordinary people can't understand at all. Therefore, when he found that the elimination method expressed in Zhang Shouna's manuscript was simple and simple, he realized who the real author of "Ge's Arithmetic New Edition" was.

Because of the more concise and clear relationship of the symbol system, the little fat man who was once tortured by the Tianyuan Technique and the Four Elements Technique in the Ge family almost easily understood the essence of the elimination method, so in his mind now, Mr. Xiao is in line with Ancestor Ge.

At least in arithmetic, Mr. Xiao has come out of the blue and is better than the blue. As for Zhang Shou's claim to have borrowed some heterogeneous arithmetic, in his opinion, it is nothing at all. If these guys are in front of them, will they read the books of the foreign countries? Do you understand?

At this moment, seeing that the round-faced young man Ye Mengqiu was concentrating on solving the problem, he didn't care whether this kid was pretending or really having this ability, but he said to the three elders behind him with a smile: "Since you are here with this Ye Gongzi, just here to watch your companions solve the problem, how boring is that?" ”

"It just so happens that our students in the first phase of Jiuzhangtang recently learned the factorization of one-dimensional quadratic equations, do you want to give it a try? The teacher gave everyone 180 exercises in one go. ”

"Oh, I forgot that you should be dissatisfied with the arithmetic symbol system that Emperor Taizu has promoted, and my ancestor Ge and my teacher have vigorously promoted. It just so happened that I had nothing to do before, so I reinterpreted these 180 questions with the Tianyuan technique. ”

Hearing this, even Zhang Shou couldn't help but twitch the corners of his mouth. The factorization of the simple one-dimensional quadratic equation is re-written into the title with the extremely troublesome exposition of Tianyuanshu, you kid call this idleness? It's called being idle! He was about to laugh and scold, but he saw Ah Liu, who was still standing beside him just now, actually came in from outside again!

It's just that this time, Ah Liu didn't easily bring in two blackboards, but held a thick stack of manuscripts in his hands, and presented the manuscripts to Lu Saburo with both hands with a serious face.

But Lu Sanlang didn't look at it, and said with a smile: "The three of you might as well take a look, this is our Jiuzhangtang's homework." In fact, as long as the students are proficient in these 180 questions, it will take an hour to complete them. ”

The three people who came with Ye Mengqiu looked gloomily at this time and took the few exercise books handed over by Ah Liu, and when they heard Lu Sanlang say that they could make these one hundred and eighty questions in just over an hour, the faces of the three of them were all blue.

Even Ye Mengqiu, who was trying to solve the problem, almost didn't hold the white pen in his hand.

Are you kidding! Shouldn't solving a problem with Tianyuan Technique be a relief and joyful way to solve a problem? How can you just do one hundred and eighty questions casually? Also, the meaning of one hundred and eighty questions, shouldn't it be one hundred or eighty questions, in short, it is not a real reference, how can you run to Lu Saburo and suddenly become one hundred and eighty questions?

Seeing the four people who broke in with a rage, one was standing in front of the blackboard at this time, and the remaining three were looking at the thick books, their faces were more ugly than the other, Liu Shilang couldn't help but breathe a sigh of relief.

He is not worried that his future son-in-law is too powerful, so after his daughter marries, she may be bullied, he is only worried that her future son-in-law is too useless, and her daughter will not be able to raise her head in front of her for the rest of her life in the future. Therefore, seeing that Lu Sanlang had just answered like a stream under the embarrassment of others, but at this time, he was in a dilemma for others, he couldn't help but give Lu Juan a thumbs up.

Of course, Lu Juan laughed heartily and had a proud expression, but when people were not paying attention, he gestured to a henchman at the door.

Even if the emperor had ordered it in advance, he expected that an uninvited guest would come to the door, and nine times out of ten he was still a wicked guest who found fault, but, without his knowledge at all, people actually broke directly into the place where the banquet was held after the crown ceremony, did he, the Lu family, become a sieve for people to enter and exit?

If it is found out that it was specially arranged by the emperor, it will be fine if it is designed by Zhang Shou, if it is arranged by the Lu family themselves, it doesn't matter if it is his other two sons, or Lu Sanlang, who wants to be in the limelight and go crazy, he can't spare them!

Lu Sanlang didn't know that his father was already ruthless and planned to thoroughly investigate the trespassing incident of these four people. He was standing shy and protruding at this moment, and in the eyes of the emperor, it was simply a fighting that had won the battle with a small test.

Although it was a little funny that Lu Saburo was pretending to be a public servant and taking the opportunity to evaluate and screen others to highlight his talent and ability, the emperor didn't see it that way at this time. As the Son of Heaven who has an arithmetic master as a teacher, things like Tianyuan Technique and Four Yuan Techniques, of course, he also dabbled in them when he was studying at Ge Yong, and then ...... Of course there is no then.

Most of the arithmetic scriptures handed down by the arithmetic ancestors of the past dynasties and dynasties, as far as the books he saw, were exactly the same purpose: that is, I was only responsible for asking a very difficult question, and then briefly mentioning the solution in the outline of the territory, and then giving you an answer. As for you not being able to read it, it's because you have poor talent and no ability, and it has nothing to do with me.

Those scriptures are not intended to be understood by ordinary people at all! So in the end, there are often only two words - lost.

Therefore, although he knew that Zhang Shou's mentorship was problematic, and he knew that Zhang Shou could use a set of symbolic systems of unknown origin in addition to the Arabic numerals promoted by Emperor Taizu, and he knew that Ge Yong was covering up for Zhang Shou in a big package, he still chose to ignore these, because he was faintly aware that these things were very useful.

The emperor not only left the three princes to Zhang Shou to teach, but he was also studying on his own with great interest, and by the way, he also tutored his two sons. At this time, he saw that Lu Sanlang was shaking his head and using the Tianyuan technique to explain the problem that Ye Mengqiu was solving, among which Tianyuan, Diyuan, Renyuan, and Wuyuan, so that countless guests here had little stars in their eyes, so he laughed.

"Alright, Takato, don't bully us unknown guests with what you're good at. I have read every volume of "Ge's Arithmetic New Edition", although the number symbols from foreign countries are indeed difficult to accept and understand at first glance, but as long as they are used well, it is much simpler and easier to understand than those expressions such as heaven and earth, people, and things! ”

"This lord is wrong to say!"

Beside Ye Mengqiu, a middle-aged man who was frowning and looking through the exercise book in his hand suddenly raised his head and said in a deep voice: "Just as Zi said, Yidi has a king, it is better to die in Zhuxia!" In the same way, it can be proved that Yidi's arithmetic is not as far as Zhuxia's arithmetic......"

This time, before he finished speaking, he was interrupted by Zhang Shou's snort laughing: "This gentleman...... I'll respect you as old and call you sir. You are taking the words out of context and misinterpreting the words of the saints. The sage said that Yidi has a king, and it is not as good as the death of Zhuxia, that is because Yidi is rude, so although there is a king, it is not as good as Zhuxia Although he died, the etiquette still exists. ”

"However, now we are not talking about etiquette, but about mathematics." Zhang Shou slowed down his speech and said word by word, "The progress of the number of techniques is not only related to itself, but also related to the accuracy of the calendar, the waxing and waning of the sun and the moon, whether the operation of the stars can be accurately calculated, the hydrology of the great rivers, whether the water control and transportation are convenient, whether the treasury surplus, and whether the income and expenditure of the account books are balanced." ”

"Didn't the Tianyuan Technique and the Four Yuan Techniques of the Yuan Dynasty have ever surpassed everyone in the previous dynasties? But now, can this little boy who admires Wang Xiaotong in the Tang Dynasty be able to solve the one-dimensional cubic equation in the "Ancient Arithmetic"? Of course, in the ancient arithmetic scriptures, it should not be such a name, I think you should know what the name is when you read through this book. And how much time will it take you to figure it out? ”

"Now the Four Books and Five Classics are deeply rooted in the hearts of the people, even if you are a seven-year-old Mengtong, you can say a few sentences of poetry, but in the past, those books of everyone who counted everyone, looking at the world, how many people can understand?"

"The Art of Fixation is lost; "Xiahou Yang Sutra" was lost; If Emperor Taizu hadn't ordered someone to revisit and transcribe the "Five Classics of Arithmetic", it would have been almost lost; This is also the book that was once listed among the ten books of the Sutra. The "Four Yuan Jade Jian", "Measuring the Circle Sea Mirror" and so on in the Yuan Dynasty were also promoted by Emperor Taizu after being recommended by the ancestors of Ge Taishi, but later the number of astronomical arts was banned for a time, and the folk have almost been lost. ”

"Although the ban has been lifted now, ordinary scholars can't understand it, and the bookstore can't make money and refuses to print, because few people are willing to buy it, and the library in the palace is shelved, and the scholars who really want to study the scriptures can't even find a decent book at all. So, it's not just a matter of high and low! ”

"Since this gentleman has just flipped over the exercises that Lu Gaoyuan explained using the method of Tian Yuan Technique, I would like to ask, how many of them can you solve?"

Seeing that his barrage of questions made the middle-aged man silent, Zhang Shou sighed and said: "From the Qin and Han dynasties to the Wei, Jin, Southern and Northern Dynasties and then to the Sui and Tang dynasties, countless books have been lost, but that is understandable, because at that time, books were more copied by hand, rather than by printing. ”

"Until the late Tang Dynasty, there were more engraving printing, and in the Song Dynasty, there were more movable type, so that the bookstore flourished, and the common people could afford to buy books.

He paused for a moment, and after thinking about it, it was better not to criticize the imperial court - in fact, the most important reason for the high and low level of arithmetic is nothing else, it is that in all dynasties, the imperial court strictly forbade astronomy and also imprisoned arithmetic! If it weren't for the high pressure of the imperial court, why would all mathematicians be court officials, and why would mathematical talents and achievements fall off a cliff now?

The little fat man pricked up his ears and listened to Zhang Shou's words, and saw that Zhang Shou had already killed people to the point of losing his armor, so he immediately shouted to mend the knife and said: "I heard that such as Tianyuan and Quaternion, which are invented by everyone in Yuanshi arithmetic, and they are very good at it, and there are many pretentious guys in this dynasty who are known as arithmetic masters, and few people are good at it!" ”

"No, I can't say I'm not good at it, I should say it's not ...... at all No! ”

"You...... Arrogant! The middle-aged man who was still holding a Zi Yu to criticize Zhang Shou just now was finally completely enraged. He angrily threw down the book in his hand, and protested angrily, "You are in the capital, in the house of the eunuch, and you are near the water and the building is the first to get the moon, where do you know the hardships of folk arithmetic!" Even "Nine Chapters of Arithmetic" has to be collected with great difficulty, and where can I go to see anything else! ”

"You don't know the blessings in the blessings, and you can come into contact with the scriptures of all dynasties and dynasties, but you don't know how to cherish them, you don't know how to use your intentions, but you go to study the scriptures of small foreign countries, this is simply a tyrannical thing!"

After he expressed his deepest resentment in a fit of anger, he was a little disheartened when he saw the brightly dressed guests in the four seats, and the eyes that looked at them were very subtle.

At that moment, he said excitedly: "Among the four of us, that is, Meng Qiu is extremely talented, and he can use the four-element technique to solve some simple problems, and the more complex ones are completely powerless. Our ancestor once served as the supervisor of Qintian during the reign of Yingzong, but when the princes were in turmoil, he went out of Beijing and passed it on again and again, so that we were the disciples. ”

"We can't learn more than a copy, it's all he painstakingly memorized! Now that the emperor is gradually forbidden astronomy, Dr. Zhang, you clearly know how many scriptures have been lost throughout the ages, why can't you carry forward the things of these ancestors, but you have to learn those things that are not elegant in small foreign countries! ”

At this moment, Zhang Shou finally understood that the words of these four people when they broke in were not an introduction to provoke, but really heartfelt words. Chinese arithmetic is unique in the world, this is their simple and stubborn understanding! It's a pity that this kind of mentality of self-esteem, whether in academics or in governing the country, is really unacceptable!

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