Chapter 734 Top Mathematician

This is also the originator of the "Original Diagram of the Square Root Method", which is a table of binomial expansion coefficients with positive integers as exponents. It is also known as the "Yang Hui Triangle" in later generations.

This is a rigorous algorithm system and ideological system, which has made great contributions to the abstraction, programming, and mechanization of mathematical algorithms. It is a breakthrough in science and engineering methodology.

After Su You stood up, he shook his head and sighed: "Jia Gong, Jia Gong, your solution of 1860687 cubed has made things difficult for me and my little sister."

Jia Xian stroked his beard happily: "There are so many talented people in our Song Dynasty. I was shocked to hear that the young girls from Meishan were able to repeat my solution in simple and easy-to-understand expressions. I was really shocked! My personal biography

The disciples can all understand the things covered in the clouds and mountains, but the despicable children in Xishu know it?"

"So I looked for your writings and took a look. Hahaha, I know it, I really know it! Not only does Shao Guangzhang know the question, but he knows all the questions!"

"Not only do you know the solution, but you also know why the solution is the way it is, which is amazing. Do you know how happy I was at that time? This is a close friend, a close friend who has been forgotten for many years! Hahahahaha..."

An old man beside him nodded: "The method of thin grass has indeed helped us a lot. It is really difficult to express our knowledge in daily language. With the thin grass, it is clear at a glance!"

Nowadays, Su Xiaomei and Su You can be regarded as important contributors in the field of mathematics. Their set of algorithmic annotation methods of Fu culture were given a nice name by the Song people - Xicao.

With Xicao, problem-solving ideas can be developed step by step, allowing learners to receive the dissemination of mathematical knowledge in a systematic and standardized manner.

This is also the content of deductive logic, which is the abstract analysis of thinking using procedures, processes and steps as tools.

Zhao Zongyou quickly introduced: "This is Zhu Ji and Zhu Gong, the younger brother of Jia Gong. They studied under the late arithmetic master Chu Yan. They are both equally famous academically. Zhu Gong's research on equations and irrational numbers is quite profound."

Zhu Ji waved his hand: "Now I can be said to be living in a corpse position, translating Master's writings all day long, and I am ashamed of the money offered by Sitong."

Su You quickly explained: "Wherever, these profound knowledge have guiding significance in mechanics, physics, algebra, statistics, geography, mechanics, astronomy, and optics. Just a prediction of net currency investment has brought great benefits to the Song Dynasty."

Endless benefits.”

Zhao Zongyou then introduced the third person: "This is Liu Yi, my senior brother. In addition to receiving the teachings of Jia Gong and Zhu Gong, he also has a very in-depth study of geographical cartography and plane geometry."

Liu Yi handed over his hand: "Thanks to Shaobao's research."

Su You was a little scared: "What's wrong with me?"

Liu Yi was inexplicably impressed: "With Shaobao's equations and the definition of longitude and latitude, the solution set of the equations can be described as a line on the plane. This line can be a straight line, and this line can be expressed by a linear equation;

But I found that more complex curves, circles, and ellipses can all be expressed using quadratic equations..."

Su You was dumbfounded: "Plane analytic geometry?"

Liu Yi's eyes lit up: "What a good name! It turns out that Shaobao has already done some research? Then Shaobao must have calculated the relationship between the focal triangle and the ellipse formula? This involves the algorithm between cartography and formulas, and the area and perimeter are also

It can be calculated, as well as the relationship between the area of ​​the triangle formed by the focus and any point on the ellipse and the angle at the fixed point..."

Su You was so frightened that he waved his hands repeatedly: "No, no, I just said casually that my academic work has been abandoned by me. You have to ask my little sister and Jing Run about this question, they will give you a reasonable explanation..."

Liu Yiyi was not finished: "Shaobao, this issue is worth studying. The sun and moon five-star level instrument provided by Tianshi Dao in Si Tianjian has errors. After calculation, I found that if the perfect circles are changed into ellipses, it will be consistent with the observation.

More consistent..."

Damn, planetary trajectories! I forgot that these guys all came from Si Tianjian!

Now that everything has been said here, Su You grabbed a piece of paper and said: "We are all experts. Everyone knows the plane rectangular coordinate system and trigonometric functions. I have an idea, a pure idea. Since Liu Gongdu

I’m already paying attention to the study of curve trajectories. It must be inspired by celestial observations, right?”

Liu Yi nodded: "Yes, it is mainly used to calculate the period of the stars."

Su Youana's compass made a circle on the map: "In this case, we might as well simplify this system. Assume that the origin of observation is the pole and extend a ray as the polar axis. Then any point on the plane can be expressed as

The distance from the point to the pole and the angular relationship between the connecting line and the polar axis.”

"Take the Sun-Moon Five-Star Plane as an example. It is possible to convert the position of each star into such angular coordinates and find out their movement rules. This system is very advantageous for calculating curves with poles.

.for example……"

Liu Yi grabbed the pencil: "For example, for a perfect circle, at any polar angle, the distance from any point on the circle to the center of the pole is equal to the radius. Therefore, under this system, the equation of a perfect circle has the simplest description, that is, the polar diameter does not follow the pole.

The circumference of the angular change.”

Su You nodded: "In navigation, mechanical circular motion, and star motion, when studying the relationship between two points, many times... I guess... using this set of angles and distances to express the coordinate system is more concise and convenient. So.

I’ll leave it to Mr. Liu to study this issue.”

Liu Yi was so happy that he scratched his head and said: "This is the great road, Mingrun, why don't you study it?"

Su You chuckled: "I really don't have this time. I have too many things to do..."

After saying that, he quickly expressed his attention: "But I have already asked Your Majesty to build an observatory for you on the Zhongshan Mountain in Jiangning Prefecture, the same as Si Tianjian. But now we have to delay a few people. First, the water volume of the Taihu Lake inlet river and the lake circumference

The statistical relationship between the cultivable area; and the statistical relationship between the economic growth of the two Zhejiang Roads, salt production and net currency input can only be calculated and studied..."

After that, Su You inspected the copper smelting plant, the coking plant, the chemical plant producing three acids and two alkali, and the cement plant.

There is salt, seaweed, sulfate mines, and coal, and these technologies have matured under Su You's rule.

The early cylinder tower method has been eliminated. Zhejiang has abundant lead and zinc mineral reserves. Now Hangzhou Chemical Plant directly uses the lead chamber method to prepare sulfuric acid; coal or animal bones are carbonized to prepare ammonia; ammonia-platinum catalytic method is used to prepare nitric acid; sulfuric acid, limestone,

Coal is used to prepare hydrochloric acid and soda ash. Soda ash and lime are used to prepare caustic soda and caustic mud for cement.

Then the ammonia plant and the alkali plant unified production, and through the later Hou's alkali production method, the soda ash industry and the nitrogen fertilizer industry were vigorously developed.

The downstream industries of these things are the booming development of metallurgy, textile, washing, papermaking, ceramics, glass, explosives, cement and other industries...

After the first rice harvest in Liangzhe Road was generally harvested, the typhoon finally brought abundant rain to Liangzhe Road. The post-drought planting and famine relief campaign was vigorously launched in the area south of Taihu Lake in Liangzhe Road.

This is the advantage of the geographical location. You can still sow seeds in June and harvest in October. Hachiko would be so jealous if he knew this!

Lu Jiawen also cried. In the blink of an eye, all the 70,000 water conservancy troops in his hands went home to farm happily!

This situation is absolutely intolerable. The upper reaches of Taihu Lake are only initially completed and can be put into practical use. However, the embankment reinforcement and the entrance to Lugang are reinforced, and a large number of cement components and stones require manpower to be placed.

Fortunately, the manpower in the area around Taihu Lake was now free again, and the people's power in Jiangning, Guangde, Runchang, Suxiuhu and other prefectures could be used again.

Anyway, if you have too many debts, you don’t have to worry about too many lice. With a wave of Suyou’s hand, Suzhou and Xiuzhou took advantage of the low water flow this year to seize the opportunity to dredge the polder downstream. Songjiang, as the main flood discharge channel, must be completed before March next year.

Transformation.

The Transshipment Department has obtained the right to print money, and now that it has a lot of money, it will continue to recruit people and speed up the construction of water conservancy projects in the lower reaches of Taihu Lake.

As for Sitong Company, they started the Hong Kong project in Changhu and Changhu!
Chapter completed!