The subordinates of the Mingxin Pavilion quickly brought pen, ink, paper and inkstone, and the scholars in the hall each wrote a number and handed it to one of the tall and thin scholars, who would report the number at that time. Pro, eye & fast, a large number of novels to read for free. Read the website

At the same time, Qi Fu also asked people to bring a few abacus, one to the elegant scholar, and the other to the on-site arithmetic master, in order to verify the correctness of the results.

Taking advantage of this opportunity, the subordinates of the Mingyue Pavilion set the food on the table like a marquee.

After the Ru Ya Shizi and the others were ready, they noticed that Li Yuntian was sitting there as steadily as Mount Tai, and he didn't have the slightest intention of using pen, ink, paper and inkstone to calculate, and he couldn't help but feel suspicious in his heart.

Li Yuntian waved his hand to the tall and thin man, and the tall and thin man began to read the numbers on the piece of paper in his hand, and the hall suddenly sounded the sound of a crackling abacus, and the elegant scholar and others methodically moved the abacus beads to calculate, while Li Yuntian leisurely tasted the wine in the wine glass, as if he had forgotten about the competition.

"Ninety-seven thousand five hundred and sixty-five!" When the thin and tall man finished reporting the thirty numbers in his hand in one go, a smile appeared on the corner of Li Yuntian's mouth, and then he said a number loudly, and then drank the liquor in the wine glass.

Hearing this, the scholars all showed surprised expressions, and they all looked at the elegant scholars, wondering what the results would be.

"Ninety-seven thousand five hundred and sixty-five!" After a moment, Ru Yazi raised his head and said a number in a loud voice with a blank face.

Boom, there was a commotion in the hall, and no one knew how Li Yuntian accurately calculated this result, which was simply unbelievable in the eyes of everyone.

"Mr. is talented, and the students are very admired!" In the midst of people's head-to-ear discussions, the elegant scholar stood up and respectfully saluted Li Yuntian, and was impressed by Li Yuntian's magical expression.

"It's just a trick, not a matter of concern, if you master this method, you will definitely be faster than this layman." Li Yuntian smiled and pressed his hand down on the elegant scholar, motioned for him to sit down, then glanced around at the scene, and said in a deep voice, "Simple addition and subtraction is just the basis of arithmetic, and only those who can master complex algorithms can be considered qualified." ”

"You have all learned the Nine Chapters of Arithmetic, and if you use Arabic numerals to perform the calculations, then the algorithm will undoubtedly be more convenient."

The hall soon fell silent, and the scholars looked at Li Yuntian intently, Li Yuntian pondered for a while, and asked, "Chapter 8 of "Nine Chapters of Arithmetic" talks about equations, and Chapter 9 talks about Pythagorean, which of you really understands the meaning?" ”

As soon as this remark came out, the scholars on the scene couldn't help but look at each other, although the equations and Pythagorean in the "Nine Chapters of Arithmetic" used the "algorithm of binary equations" to solve problems in real life, but they did not invent the "binary equations", so they were jerky and difficult to understand, and they had great limitations in use. The update is the fastest and most stable

Not to mention ordinary scholars, even those who are in charge of the arithmetic students of Guozijian have not really understood it, let alone solve problems in real life, so naturally no one is interested in this.

It is a pity that although the ancients had ingenious algorithmic ideas, they could not find a suitable form due to the limitations of the times, that is, the algorithm system to elaborate it.

This leads to the fact that the theories and ideas of equations and Pythagorean in the Nine Chapters of Arithmetic are not widely circulated, let alone inherited and developed.

Even the ancients themselves, if they wanted to study this problem in depth, they only had algorithmic ideas without a clear algorithm system to support them, and it was difficult to carry out follow-up research.

"Combined with the painstaking efforts of our predecessors, this layman has established a set of computing systems." Seeing that the eyes of the scholars showed a look of shame, Li Yuntian threw out his "killer feature" inappropriately and said loudly, "In this calculation system, unknowns will be involved, and different symbols will be used to answer the questions, so as to form a system of equations for operation. ”

When the scholars heard this, their eyes suddenly lit up, and they looked at Li Yuntian intently, wanting to know what the computing system in his mouth was.

Seeing this, a subtle smile appeared on the corner of Li Yuntian's mouth, and with a wave of his hand outside the door, several subordinates carried a large blackboard in and placed it in front of the hall.

A subordinate was holding a small wooden box in his hand, and in the wooden box were some small lime sticks, which were chalk specially made by Li Yuntian.

"Take a question on the "Sun Tzu Sutra" as an example, today there are chickens and rabbits in the same cage, 35 on the top, 94 feet on the bottom, ask the chickens and rabbits how much they are."

Li Yuntian took out a piece of chalk from the small wooden box, walked to the blackboard, and smiled at the scholars who were looking at him in the room, "Everyone must know this problem, and they all have their own solutions. ”

"Since the number of chickens and rabbits is unknown, they are two unknowns, so the layman replaced the number of chickens with the Xiyi character x, and the number of rabbits with the Xiyi character y, so that two sets of equations can be obtained."

As he spoke, Li Yuntian listed a binary equation on the blackboard with the head and feet of a chicken and a rabbit, and then combined the two binary equations together, and said loudly, "Since these two equations are about the problem of chickens and rabbits, the numbers represented by these two unknown symbols in them are the same, so they can be solved together." ”

Under the surprised gaze of the scholars, Li Yuntian methodically solved this binary equation, and the result was that there were 23 chickens and 12 rabbits.

"It's not just this problem, but with this system, it can be used to solve many problems in daily life, and anyone can use it skillfully after learning it."

Li Yuntian put the chalk in his hand back into the small wooden box, patted the dust on his hand, and said to the gentlemen in the room with a smile.

"Sir, does this equation have a name?" There was silence in the hall at first, and then the elegant scholar who had challenged Li Yuntian earlier got up and asked suspiciously.

"There are two unknowns in this set of equations represented by Xiyi characters, and each unknown is called a 'yuan', so the layman calls each equation a binary equation, and this set of equations is a system of binary equations."

Li Yuntian smiled slightly, and explained in a deep voice, it seems that he showed this hand well just now, which has aroused the strong interest of the scholars and others at the scene.

"Sir, is there a ternary equation or a binary quadratic equation?" Ru Yazi did not sit down, but thought about it and asked tentatively.

"Yes, as the saying goes, step by step, wait until you master the one-dimensional equation first, and then move on to the other equations." Li Yuntian couldn't help but glance at the elegant scholar more, and felt that this person had a good understanding, and he realized the subtleties in it so quickly.

Hearing this, Ru Yashi sat down and looked at Li Yuntian's algorithm on the blackboard, with a thoughtful look on his face.

"Thank you for being able to come here to take the exam, and I will definitely teach you what you have learned and encourage you together." Li Yuntian then came to his seat, raised the wine glass full of liquor on the table and said loudly.

"Mr. Xie!" The scholars stood up with their wine glasses in their hands and replied in unison, after Li Yuntian's brave expression just now, it was obvious that everyone had regarded Li Yuntian as their division commander.

After lunch, Li Yuntian gave a general explanation to the scholars on the scene about the application and algorithm of the one-dimensional equation and the binary one-dimensional equation, and then left in a hurry and rushed to the yamen of the criminal department.

Qi Fu gave each scholar a book containing the four rules of operation written by Li Yuntian, as well as the algorithms, examples, and exercises of unary and binary equations.

This book is regarded as a treasure by Ru Yashi and others, properly collected, read it as if fascinated, and was attracted by such a magical algorithm.

Not only that, Qi Fu also asked the Confucian scholars and his party to come to the Bright Moon Pavilion every five days, and someone would give them lectures and answer their questions.

Ru Ya Shizi and the others thought that it would be Li Yuntian who would teach them, but then they found out that it was another man wearing a mask, and Li Yuntian and Li Yuntian took turns teaching them.

The other man wearing a mask was naturally Yang Yungui, Yang Yungui was the first person to contact natural sciences except for Lu Calyx and Chen Ningning, so he was naturally arrested by Li Yuntian.

When he arrived at the yamen of the Criminal Department, Li Yuntian continued to check the case files of the Shanxi Qing Officials Division of the Criminal Department as usual, and the Shanxi Qing Officials were waiting with sweat on his face, if Li Yuntian took the opportunity to make trouble, he would be unlucky.

However, contrary to the expectations of Shanxi Qing official Shilang, although Li Yuntian pointed out some omissions and doubts in the case file, he did not make a fuss about it, but just asked him to issue a document to let the Fuzhou County to which the case belonged retry the case, and listed the suspicious and unreasonable points one by one, which made him secretly relieved.

Li Yuntian is not the kind of person who grabs other people's pigtails and doesn't let go, and those case files have been reviewed by the Shanxi Criminal Prosecution Division, if he makes a big fuss, then it will make both the Criminal Department and the Shanxi Criminal Prosecution Division unstable.

Therefore, Li Yuntian gave them a chance to change their ways in the friendship of his colleagues, so as not to leave a reputation in the officialdom as a cool official who did not understand human feelings.

Shi Langzhong, a Shanxi Qing official of the Criminal Department, immediately issued a document to the Shanxi Judicial Division, and attached Li Yuntian's omissions and unreasonableness, asking them to retry the case.

If those officials in Fuzhou and counties ignore Li Yuntian's euphemistic admonitions, then Li Yuntian doesn't mind investigating those cases, he can be regarded as benevolent and righteous, and outsiders naturally have nothing to say.

In the cross-sampling on the third day, Li Yuntian also adopted a gentle approach to those problematic case files, no matter which camp the person in charge of reviewing the supervision of the imperial history was, he communicated with them, and finally resolved the problem peacefully.

Under Li Yuntian's secret mediation, the Metropolitan Procuratorate came to a successful conclusion in the Criminal Department's brushing this time, which also made the judges of the Criminal Department breathe a sigh of relief.

At the same time that the Criminal Department was swept by the Metropolitan Procuratorate, the Ministry of Industry was also brushing, and unlike the Criminal Department, the Cabinet and the Supervision Imperial History of the Five Prefectures and Six Ministries took this opportunity to vigorously suppress the Ministry of Industry Langzhong of the opposing camp, and as a result, there was a fight to the death, until Qianyi and Xia Yuanji intervened in the round, and the matter came to an end.

Since the establishment of the Ming Dynasty, it is the first time that the chief officials of the major yamen in the capital have been so nervous to face the brush scrolls of the Metropolitan Procuratorate, and the officials of the cabinet and the five governments and six ministries have all dealt with it carefully, for fear that there will be a handle in the hands of the imperial history of the other camp.

After witnessing that the two factions in the Imperial Court had turned the Ministry of Industry upside down, Yang Shiqi didn't want to do anything when Emperor Hongxi moved the capital, so he sent Li Yuntian, who was originally to the General Political Envoy Department to brush the scrolls, to the most important officials in the six ministries to brush the scrolls.

The Ministry of Officials is the focus of contention between the cabinet and the five governments and six ministries, and the imperial history belonging to the two camps originally held back a lot of strength to toss each other, but with Li Yuntian's sudden intervention, the tense atmosphere between the two sides has virtually weakened a lot.

Although the imperial history under the command of the five mansions and six departments was numerous, because he was afraid of Li Yuntian, he took a defensive position, and no one wanted to take the initiative to provoke him, so as not to attract Li Yuntian's thunderous counterattack.

And Yu Shi, who was in the same camp as Li Yuntian, naturally knew what Yang Shiqi meant, and he would not take the initiative to stir up trouble, and the official scroll ended unscathed.

However, if the outside world thinks that Li Yuntian has a mild personality, it is a big mistake, and at a big court at the end of May, his appearance surprised everyone. One