Euler
Euler is a famous mathematician in the history of mathematics. He has achieved outstanding results in several branches of mathematics such as number theory, geometry, astronomical mathematics, and calculus. achievements. However, this great mathematician did not please the teacher at all when he was a child. He was a primary school student who was expelled from the school. The incident was caused by the stars. At that time, little Euler was studying in a church school. .Once, he asked his teacher how many stars there were in the sky. The teacher was a believer in theology. He didn’t know how many stars there were in the sky. There was no answer in the Bible. In fact, there are countless stars in the sky and they are infinite. There are thousands of stars visible to our naked eyes. The teacher didn't know how to pretend to understand, and answered Euler: "It doesn't matter how many stars there are in the sky, as long as you know that the stars in the sky are inlaid by God." Euler Ra felt very strange: "The sky is so big and high, and there are no escalators on the ground. How did God put the stars on the canopy one by one? God himself put them on the canopy one by one. He Why did you forget the number of stars? Could God be too careless?" He asked the teacher the question in his heart. The teacher was once again stopped by the question, his face turned red, and he didn't know how to answer. The teacher's heart suddenly changed. A surge of anger arose, not only because a child who had just started school asked the teacher such a question, which made the teacher unable to step down, but more importantly, the teacher valued God above all else. Little Euler actually blamed God Why didn't you remember the number of stars? The implication is that you doubted the Almighty God. In the mind of the teacher, this was a serious problem. In Euler's time, there was absolutely no doubt about God. People could only think. A slave who is absolutely not allowed to think freely. Little Euler did not "align" with the church and God, so the teacher asked him to leave school and go home. However, in little Euler's heart, God's sacred halo disappeared. He thought, God is a loser. Why can't he remember the stars in the sky? He also thought that God is a dictator and even asking questions is a sin. He also thought that God may be a guy made up by some people and does not exist at all. After returning home and having nothing to do, he helped his father herd the sheep and became a shepherd boy. While he herded the sheep, he read. Among the books he read were many mathematics books. His father's flock gradually increased and reached 100. It turned out that The sheepfold was a bit small, so my father decided to build a new sheepfold. He measured a rectangular piece of land with a ruler, 40 meters long and 15 meters wide. He calculated that the area was exactly 600 square meters. On average, each sheep It covers an area of ??6 square meters. When he was about to start construction, he found that his materials were only enough to surround a 100-meter fence, which was not enough. If he wanted to enclose a sheepfold that was 40 meters long and 15 meters wide, its circumference would be 110 meters ( 15+15+440=110), the father felt very embarrassed. If he wanted to build according to the original plan, he would have to add another 10 meters of material; if the area was reduced, the area of ??each sheep would be less than 6 square meters. Xiao Ou Raque told his father that there was no need to shrink the sheepfold, and there was no need to worry that each sheep's territory would be smaller than the original plan. He had a way. His father did not believe that little Euler had a way, so he ignored him. Little Euler became anxious. He said loudly that all he had to do was move the stakes of the sheepfold slightly. After hearing this, his father shook his head and thought: "How can there be such a cheap thing in the world?" However, little Euler insisted that he would get the best of both worlds. The father finally agreed to let his son give it a try. Seeing that his father agreed, little Euler stood up and ran to the sheepfold where the construction was about to begin. Using a wooden stake as the center, he shortened the original 40-meter side length to 25 meters. The father was anxious and said: "How can it be done? How can it be done? This sheepfold is too small, too small." Little Euler did not answer, ran to the other side, and changed the original 15 meters. The side length was extended by another 10 meters, becoming 25 meters. After this change, the originally planned sheepfold became a square with a side length of 25 meters (25+25+25+25=100). Then, little Euler confidently said to his father: "Now, the fence is enough, and the area is enough." His father put up a fence according to the sheepfold designed by little Euler. A 100-meter-long fence is really enough. , no more, no less, all used up. The area is enough, and it is slightly larger. The father is very happy. The child is better than himself.
He is smart and can really use his brain, and he will definitely be very promising in the future. His father felt that it was a pity to let such a smart child herd sheep. Later, he tried to get little Euler to meet Bernoulli, a great mathematician. Through this Recommended by mathematicians, little Euler became a college student at the University of Basel in 1720. In this year, little Euler was 13 years old and the youngest undergraduate at the university.
Mathematical wizard-Nay Poole
Do you remember the four great inventions? They are Indo-Arabic notation, decimal system, logarithms and computers. Among them, logarithms were invented by Neil Poole in the seventeenth century. He was born in the capital of Scotland in 1550 Edinburgh, who loved mathematics and science since he was a child, was recorded in the history of mathematics for his four genius achievements. Among them, the invention of logarithms made the whole of Europe boil. Laplace believed that "the discovery of logarithms extended the history of the world by saving labor." Life span of an astronomer. "It can be said that the discovery of logarithms advanced modernization by at least two hundred years. Now I will tell you two little stories about him: Once, he claimed that his black-feathered rooster could confirm for him: His Which servant stole his things? The servants were sent into the dark room one by one and asked to pat the rooster's back. The servants didn't know that Naple had painted the rooster's back black with smoke. The servant who felt guilty was afraid of being beaten. He came back with clean hands after holding the rooster. Another time Naple was annoyed because his neighbor's pigeons were eating his food. He threatened that if his neighbor did not restrict the pigeons and let them fly around, he would Confiscating some pigeons. The neighbor thought that his pigeons were impossible to catch, so he told Naipel that if he could catch them, he could do it. The next day, the neighbor saw his pigeons in Naipel's house. The pigeons staggered on the lawn, very surprised, and Naipel calmly put them into a large bag. It turned out that Naipel had scattered some peas soaked in brandy here and there on his lawn to make the pigeons drunk. .
Descartes
Descartes’ most outstanding achievement was the creation of analytic geometry in the development of mathematics. In Descartes’ time, algebra was still a relatively new subject. , geometric thinking still occupies a dominant position in the minds of mathematicians. Descartes was committed to the study of the connection between algebra and geometry. In 1637, after creating the coordinate system, he successfully founded analytic geometry. His This achievement laid the foundation for the creation of calculus. Analytic geometry is still one of the important mathematical methods until now.
Von Neumann
The most outstanding mathematician of the 20th century One of them is von Neumann. As we all know, the electronic computer invented in 1946 has greatly promoted the progress of science and technology and social life. In view of the key role played by von Neumann in the invention of the electronic computer, He is hailed as the "Father of Computers" by Westerners. From 1911 to 1921, while studying at Lutheran High School in Budapest, von Neumann rose to prominence and was highly valued by his teacher. Under the individual guidance of Teacher Feicht And collaborated to publish the first mathematical paper, when von Neumann was less than 18 years old.
Mathematician Yang Hui
Yang Hui, an outstanding mathematician and mathematician in the Southern Song Dynasty of China Educator. He was active in Suzhou and Hangzhou in the mid-13th century and wrote many books. His famous mathematics book *** has five kinds of twenty-one volumes. He is the author of "Detailed Explanation of Nine Chapters Algorithm" in twelve volumes (1261), " "Daily Use Algorithms" in two volumes (1262), "Multiplication and Division General Variations" in three volumes (1274), "Arithmetic of Multiplication and Division in Fields and Acres" in two volumes (1275), "Algorithms of Continuing the Ancient and Picking Strange Things" in two volumes (1275) ). The focus of Yang Hui's mathematical research and education work is on computing technology. He summarized and developed shortcut algorithms for multiplication and division, and some of them were compiled into songs, such as Jiugui Oral Jue. 》Introduced various forms of "vertical and horizontal graphs" and related construction methods. At the same time, "stack product technique" is Yang Hui's research on high-order arithmetic series after Shen Kuo's "gap product technique". Yang Hui in "Compiled Classification" "In "Nine Chapters of Arithmetic", the 246 questions in "Nine Chapters of Arithmetic" are re-divided into multiplication and division, fractional ratio, combined ratio, interchange, two-decline fraction, superposition, surplus and deficiency, equation, Pythagorean and nine categories. He attached great importance to the popularization and development of mathematics education. In "Algorithm Tongbian Benmo", Yang Hui's "Exercise Calculation Program" for beginners is an important document in the history of Chinese mathematics education.
>Outstanding mathematician Hua Luogeng
In the primitive land of modern mathematics in China, there is a pioneer who believes that "it is a good thing for a soldier to die on the battlefield". He is Hua Luogeng. Hua Luogeng is a pioneer in Chinese analytic number theory, typical theory, and matrix geometry. He is the founder and founder of many aspects of research, including the theory of automorphic functions and the theory of functions of multiple complex variables. He is also the most outstanding representative of China's entry into the ranks of world-famous mathematics. His research results were named "Fahrenheit's Theorem" by the international mathematical community. ", "Brouwer-Gardan-Wah Theorem", "Wah-Wang method", "Wah's operator", "Wah's inequality", etc. He left us more than 200 academic papers and 10 books in his life Monographs, 8 of which have been translated and published abroad, some of which have been included in the classic works of this century. He creatively applied mathematical methods to the field of national economy and screened out the "optimization method" and "optimization method" which are based on mathematical methods for improving process problems. A "coordination method" that deals with production, organization and management issues. He is the first Chinese scholar elected as a foreign academician in the history of the American Academy of Sciences. He was also elected as an academician of the Bavarian Academy of Sciences in Federal Germany; the University of Nancy in France; and the University of Illinois in the United States. The University of Smithsonian and the Chinese University of Hong Kong awarded him honorary doctorates. His name has been entered into the Smith-Sonny Museum in Washington, USA, and is listed as one of the 88 great figures in mathematics today in the Museum of Science and Technology in Chicago.
Mathematics Chen Jingrun
Chen Jingrun (1933.5~1996.3) is a modern Chinese mathematician. He was born in Fuzhou City, Fujian Province on May 22, 1933. He graduated from the Department of Mathematics of Xiamen University in 1953. Because of his answer to the Tali problem The results were improved, and Hua Luogeng paid attention to him. He was transferred to the Institute of Mathematics, Chinese Academy of Sciences, where he first served as an intern researcher and assistant researcher, and then was promoted to researcher and was elected as a member of the Department of Mathematical Physics of the Chinese Academy of Sciences. Chen Jingrun is a world-famous analytic number theory scholar. In the 1950s, he made important improvements to the previous results of the Gaussian circle grid point problem, the sphere grid point problem, the Tali problem and the Waring problem. After the 1960s, he also made important improvements to the sieve method and its Conduct extensive and in-depth research on important issues. In 1966, Chen Jingrun, who was living in a six-square-meter hut, borrowed a dim kerosene lamp, leaned on the bed board, used a pen, consumed several sacks of draft paper, and actually conquered He solved (1 + 2) in the world-famous mathematical problem "Goldbach's conjecture", creating a brilliance that is only one step away from picking up the crown jewel of number theory (1 + 1). He proved that "every major "Even numbers are the sum of a prime number and the product of no more than two prime numbers", making him a world leader in the study of Goldbach's conjecture. This result is internationally known as "Chen's theorem" and has been widely cited. This work also enabled him to win the first prize of the China Natural Science Award together with Wang Yuan and Pan Chengdong in 1978. His achievements in studying Goldbach's conjecture and other number theory problems are still far ahead in the world. The world A (Weil), a world-class mathematics master and American scholar, once praised him: "Every work of Chen Jingrun is like walking on the top of the Himalayas." Chen Jingrun collected mathematics twice in 1978 and 1982. He was invited to the International Congress of Mathematicians to give a 45-minute report. This is the pride and pride of the Chinese people. The achievements he has made and the honors he has won have set up an unfading banner for thousands of intellectuals. It reflects the three mountains and five mountains, calling hundreds of millions of young people to move forward. Chen Jingrun*** has published more than 70 academic papers.
The mathematician Archimedes
Archimedes ( About 287~212 BC) - Greek physicist and mathematician. Archimedes' father was an astronomer and mathematician. He received a good education since he was a child and especially loved mathematics. Once, the king invited him He went to determine whether the crown the goldsmith had just made for him was pure gold or a mixture mixed with silver, and warned him not to damage the crown. At first, Archimedes was at a loss. Until one day, when he was full of When a person is immersed in a basin of water, the volume of the overflowing water is equal to the volume of the part of his body immersed in the water. Then, if the crown is immersed in the water and the volume of the crown is equal to the volume of equal weight of gold based on the rise of the water surface, it means that the crown is pure It was made of gold; if it was mixed with silver, the size of the crown would be larger. He jumped out of the bathtub excitedly, his whole body
He ran naked to the palace, shouting: "I found it! I found it!" For this reason, he invented the principle of buoyancy. In addition, he also discovered the famous lever principle. Along with this invention, there were also He made a well-known saying: "As long as you give me a fulcrum, I can move the earth." In Archimedes' old years, his homeland had a war with Rome. When the city where he lived was plundered, Archimedes Mead also concentrated on studying the geometric figures he drew on the sand. The ferocious Roman soldiers stabbed the 75-year-old man, and the great scientist fell on the geometric figures stained red with blood... Archimedes died Later, people compiled and published "The Complete Works of Archimedes" to forever commemorate the great achievements of this scientific giant.
Newton (1642～1727) Newton (1642～1727)
Newton was a British physicist and mathematician. He was the president of the Royal Society. Newton is universally recognized as one of the greatest scientists in history. His childhood was full of bitterness. Three months before his birth, his father died He died, and his mother remarried, and he was raised by his maternal grandmother. After graduating from the famous Cambridge University at 23, he stayed at school to work. Later, he escaped from the plague in London and came to his mother's farm. Here, he was ignored by ordinary people. He was attracted by the phenomenon. Once, he saw a ripe apple falling to the ground, and he began to think about why the apple fell vertically to the ground instead of flying into the sky? There must be a force pulling it. So will this force pulling the apple downward control the moon? It was through this seemingly simple phenomenon that he discovered the famous law of universal gravitation. The huge role of this law was quickly revealed. It explained the All known movements of celestial bodies. At the same time, Newton completed an important optical experiment, thus proving that white light is composed of synthetic light arranged in the order of red, orange, yellow, green, cyan, blue and violet. 1687 , Newton published the greatest scientific work in history, "Mathematical Principles of Natural Philosophy". Here, he studied Galileo's theory and summarized the famous three laws of motion. In addition, he discovered the binomial equation Theorem also has a place in the world of mathematics. In 1704, he published the book "Optics", which summarized the results of his research on optics. When Newton was 61 years old, he was elected president of the Royal Society and was re-elected every year until his death. As a world-renowned Recognized as the most outstanding scientific giant, he still said humbly: "If I can see further than others, it is because I stand on the shoulders of giants." On March 20, 1727, 84-year-old Newton Passed away. As a great man who contributed to the country, he was buried in the British National Cemetery and was respected by the world.
The mathematician Liu Hui Liu Hui (born around 250 AD) is one of the most important figures in the history of Chinese mathematics. A very great mathematician, he also occupies an outstanding position in the history of world mathematics. His masterpieces "Nine Chapters on Arithmetic" and "Island Arithmetic Classic" are the most precious mathematical heritage of our country. "Nine Chapters on Arithmetic" was written about At the beginning of the Eastern Han Dynasty, *** had solutions to 246 problems. In many aspects: such as solving simultaneous equations, four arithmetic operations with fractions, positive and negative number operations, calculation of the volume and area of ??geometric figures, etc., they were among the most advanced in the world. However, due to The solution was relatively primitive and lacked necessary proofs, but Liu Hui provided supplementary proofs. These proofs showed his creative contributions in many aspects. He was the first person in the world to propose the concept of decimals. He also used decimals to express the cube roots of irrational numbers. In terms of algebra, he correctly proposed the concept of positive and negative numbers and the rules of addition and subtraction; he improved the solution method of linear equations. In terms of geometry, he proposed the "circle severing method" ", a method of finding the area and circumference of a circle by exhausting the circumference with inscribed or circumscribed regular polygons. He scientifically obtained the result of pi = 3.14 by using the technique of cutting circles. Liu Hui proposed in the technique of cutting circles "If you cut it very finely, you will lose very little; if you cut it again and again until it cannot be cut, it will merge with the circle and nothing will be lost." This can be regarded as a masterpiece of ancient Chinese limit concepts. The book "Haidao Suan Jing" In it, Liu Hui carefully selected nine measurement problems. The creativity, complexity and representativeness of these problems attracted the attention of the West at that time.
Liu Hui’s quick thinking and flexible methods not only advocated reasoning He also advocated intuition. He was the first in China to explicitly advocate the use of logical reasoning to demonstrate mathematical destiny.
Liu Hui's life was a life of diligent pursuit of mathematics. Although he had a low status, he had a noble personality. He was not a mediocre person who sought fame and reputation, but a great man who never tired of learning. He left a precious legacy to our Chinese nation. Wealth.
China's outstanding mathematician Su Buqing, Honorary President of Fudan University, Honorary Chairman of the Chinese Mathematical Society, and Academician of the Chinese Academy of Sciences, Su Buqing (1902.9.23—) is a highly respected old mathematician. In addition to his work as a citizen In addition to the chairman of the Central Consultative Committee of the League, he is also the vice chairman of the 7th and 8th National Committee of the Chinese People's Political Consultative Conference. He was born in a peasant family in Daixi Township, Tengjiao District, Pingyang County, Zhejiang Province. His parents gave birth to 13 children, and he is the second son. In his childhood, he had to help his family cut grass, feed pigs, and herd cows. Due to poverty in his family, he was unable to go to school at the age of six. He passed by the private school every day while herding cows, so he secretly ran to the window to watch and eavesdrop on the teacher's teaching. Later, his father saw him He loved studying so much that when he was 9 years old, the family ate cereals, saved rice, borrowed a few yuan, picked up a load of rice, and took him to the only primary school in Pingyang County, 100 miles away from home, as a transfer student. He knew After reading some words, he looked for books to read by himself, reading "Romance of the Three Kingdoms", "Water Margin", and even "Strange Stories from a Chinese Studio" which is not easy for children to understand. He read Su Buqing's "Strange Stories from a Chinese Studio" ten or twenty times. Mathematics achievements: In 1983, the Japanese Mathematical Society held an annual mathematics conference at Hiroshima University. The Chinese Mathematical Society delegation was invited to participate. At that time, Su Buqing was the leader of the delegation, and its members included Professor Hu Hesheng and Professor Wang Yuan. At the conference, Su Buqing summarized his The more than 50 years of academic activities that began in 1926, surrounding various topics in differential geometry, can be roughly divided into five stages: (1) 1926-1930, mainly engaged in affine differential geometry; (2) 1930-1940, focusing on Research projective differential geometry; (3) 1940-1950, focus on general space differential geometry; (4) 1950-1966, focus on projective yoke net theory; (5) 1966-, in the field of computational geometry. In 1983 In 2008, he has published *** 153 papers and written 10 monographs and textbooks. He is known as the founder of the "classical differential geometry school" in China. Differential geometry uses modern analysis with algebra, topology and other tools. A subject that studies spatial forms. Before the Cultural Revolution, China's basic theory in this area was close to and partially caught up with or exceeded the world level. During the Cultural Revolution, due to the cessation of scientific research, work in this area fell behind. The geometry master Chen Shengshen believes that, Su Buqing uses the characteristics of singular points of geometric figures to express the invariants of the entire circle. This is a characteristic of his work. Many scholars who engage in local differential geometry often discard singular points; but Su Buqing uses singular points to discover hidden geometric properties and think. The method is very unique. September 23, 1987 was Su Buqing's 85th birthday and also his 60th anniversary of teaching and engaging in mathematics research. Fudan University and the Shanghai Mathematical Society held a conference to congratulate Su Buqing for 60 years of mathematics and scientific research. At the conference, his Proud disciple Gu Chaohao said: "Mr. Su is an internationally recognized authority on geometry. His high-level work on affine differential geometry and projective differential geometry still occupies an indisputable position in the international mathematics community."
Su Buqing has made great contributions to the construction of Chinese mathematics disciplines. He worked hard to create influential disciplines at home and abroad at Zhejiang University and Fudan University. He also made an indelible contribution to the reform of China's cultural and educational undertakings. He has been in China since 1966. In computational geometry, he and his student Liu Dingyuan introduced the affine invariant method in algebraic curve theory into geometric calculations. They used this method to lay out the hull and made a contribution to the shipbuilding industry. This shortened the hull construction cycle and improved the hull quality. The quality of construction, saving materials and labor hours. By 1983, they used these theories to design the shape of automobile bodies. In the 1990s, they applied these theories and methods of computational geometry to the development of architecture, clothing , on the computer-aided design system of internal combustion engine and other industries. Designers can modify the design plan from the computer screen.
Mathematical wizard——Gallois Mathematical wizard——Gallois——
On the morning of May 30, 1832, an unconscious young man was lying near Lake Grassell in Paris. A passing farmer judged from the gunshot wound that he had been seriously injured after a duel, so he took the unknown young man to his side. Carry to the hospital. Early the next day
He passed away at ten o'clock in the morning. The youngest and most creative mind in the history of mathematics stopped thinking. People say that his death delayed the development of mathematics for decades. This young man was under 21 years old when he died. Galois. Galois was born in a small town not far from Paris. His father was a school principal and also served as mayor for many years. The influence of his family made Galois always move forward courageously and fearlessly. In 1823, 12-year-old Galois Hua left his parents and went to study in Paris. He was not satisfied with the rigid classroom indoctrination. He went to find the most difficult original mathematics books to study by himself. Some teachers also gave him great help. The teachers commented on him that he "should only study in the cutting-edge fields of mathematics". "Work". In 1828, at the age of 17, Galois began to study equation theory. He created the concept and method of "permutation groups" and solved the equations that had been a headache for hundreds of years. Galois's most important achievement , proposed the concept of "group" and used group theory to change the entire face of mathematics. In May 1829, Galois wrote his results as a paper and submitted it to the French Academy of Sciences. However, along with this masterpiece came a series of First, his father committed suicide because he could not bear the slander of the priests. Then, because his answer was both simple and profound, the examiners were dissatisfied and failed to enter the famous Ecole Polytechnique in Paris. As for his thesis, it was first considered to be too new a concept. It was too many and too brief and required rewriting; the second manuscript with detailed derivation was missing because the reviewer died of illness; the third paper submitted in January 1831 was unable to be read in full because the reviewers could not read it all. Understood but denied. On the one hand, the young Galois pursued the true knowledge of mathematics, and on the other hand, he devoted himself to the cause of pursuing social justice. In the "July Revolution" in France in 1831, as a freshman at the Ecole Normale Supérieure, Galois led the The masses took to the streets to protest against the king's autocratic rule, and unfortunately he was arrested. In prison, he contracted cholera. Even under such harsh conditions, Galois continued his mathematical research and wrote a thesis. Published after he was released from prison. Not long after he was released from prison, he died in a duel because he was involved in a boring "love" entanglement. It was 16 years after Galois's death that his 60 pages of manuscripts were published and the news spread about him in the scientific community. The name.
The father of mathematics—Salles The father of mathematics—Salles—
Salles was born in 624 BC and was the first person in ancient Greece. A world-famous mathematician. He was originally a very shrewd businessman. After accumulating considerable wealth by selling olive oil, Salles concentrated on scientific research and travel. He was diligent and studious, but at the same time he was not superstitious about the ancients and had the courage to do so. Exploration, the courage to create, and positive thinking about problems. His hometown is not too far from Egypt, so he often travels to Egypt. There, Salles got to know the rich mathematical knowledge accumulated by the ancient Egyptians over thousands of years. He traveled to Egypt At that time, he used an ingenious method to calculate the height of the pyramid, which made the ancient Egyptian King Amesses envious. Salles' method was both ingenious and simple: choose a sunny day and erect a small wooden stick beside the pyramid. , and then observe the change in length of the shadow of the stick. When the length of the shadow is exactly equal to the length of the stick, quickly measure the length of the shadow of the pyramid, because at this moment, the height of the pyramid happens to be equal to the length of the shadow of the tower. Some people also say that Sailer He calculated the height of the pyramid by using the ratio of the length of the shadow of the stick to the shadow of the tower, which is equal to the ratio of the height of the stick to the height of the tower. If this is the case, the mathematical theorem that the corresponding sides of a triangle are proportional should be used. Salles boasted that he was the This method was taught to the ancient Egyptians, but the opposite may be true. The Egyptians should have known similar methods for a long time, but they were only satisfied with knowing how to calculate, but did not think about why they could get the correct answer by calculating this way. .Before Salles, when people understood nature, they were only satisfied with the explanations they could provide for various things. The greatness of Salles was that he could not only provide explanations, but also add explanations. The scientific question mark of why
. The mathematical knowledge accumulated by the ancient Eastern people must be some calculation formulas summed up from experience. Salles believes that the calculation formulas obtained in this way can be used in a certain problem. It may be correct, but it may not be correct when used in another problem. Only after it is proved theoretically that they are universally correct can they be widely used to solve practical problems. In the early days of the development of human culture, Salles realized that It is commendable to put forward such a point of view. It gives mathematics
With special scientific significance, it is a huge leap in the history of mathematics. So Salles is known as the father of mathematics, and this is why. Salles was the first to prove the following theorem: 1. A circle is divided by any diameter Divide in half. 2. The two base angles of an isosceles triangle are equal. 3. Two straight lines intersect, and the vertex angles are equal. 4. A triangle inscribed in a semicircle must be a right triangle. 5. If two triangles have one side and If the two angles on this side are equal, then the two triangles are congruent. This theorem was also first discovered and proved by Salles. Later generations often call it Salles' theorem. It is said that Salles proved it. He was very happy after this theorem and slaughtered a bull to worship the gods. Later, he also used this theorem to calculate the distance between ships at sea and land. Salles also made pioneering contributions to ancient Greek philosophy and astronomy. History Scientists definitely say that Salles should be regarded as the first astronomer. He often lay on his back to observe the constellations in the sky and explore the mysteries of the universe. His maid often joked that Salles wanted to know the distant sky, but ignored the beauty in front of him. Color. Historian of Mathematics
Herodotus has learned from the textual research that day suddenly turned into night (actually a solar eclipse) after the battle of Hals, and before the battle, Thales had predicted this to Delians. Cyrus, Le There is an inscription on Si's tombstone: The tomb of this king of astronomers is somewhat small, but his glory in the field of stars is quite great.