Born in Syracuse, Sicily, he studied mathematics under Euclid and devoted himself to theoretical research. His greatest contribution to mathematics is the study of geometry. He developed the previous exhaustive method, and regarded the area or volume as something with weight, consisting of many strips or pieces. Then he uses the known area or volume to "balance" these elements, find out the center of gravity and fulcrum, and use the lever theorem to find out these areas or volumes. His work has included the idea of calculus. In this way, he worked out the area of parabola and spiral, the area and volume of sphere and its cross section, the volume of ellipsoid, paraboloid and hyperboloid, etc. He is the founder of theoretical mechanics and is famous for proposing Archimedes buoyancy theorem (see Archimedes principle) and lever principle. Legend has it that he once declared, "Just give me a fulcrum and I will move the earth." He also invented the spiral waterwheel, which can be used for drainage or irrigation. Archimedes wrote many works, such as On Sphere and Cylinder, Measurement of Circle, Conical Surface and Rotating Ellipsoid, On Spiral, Quadrature Method of Parabolic Figure, Balance of Plane Figure or Its Center of Gravity and Sand Counter.
Archimedes was the most accomplished scientist in the third century BC, and his brilliant achievements in mathematics, physics and other fields will be celebrated forever.
Zeng Xian 'an is a special-grade teacher in middle school, a young and middle-aged expert with outstanding contributions from the Ministry of Railways, a teaching expert in Shandong Province, a senior coach of China Mathematical Olympics, and a winner of the Silver Award for Excellent Gardeners in Jiangsu Province.
Comrade Zeng Xian 'an has made great achievements in teaching management and teaching research in middle schools. In recent years, he has published more than 300 valuable articles in famous journals at home and abroad, some of which have attracted the attention of authoritative experts in education. He made a serious study of mathematics teaching methods and adopted his own unique and flexible teaching methods. In teaching, he can grasp the key points and difficulties of each chapter, broaden students' thinking of solving problems, make students draw inferences from others and solve many knowledge difficulties. More than 20 books on teaching and research in middle schools have been published, which are well received by middle school teachers and students.
Chen Jingrun (1933 ~ 1996), a mathematician in China. Academician of China Academy of Sciences. 1933 was born in Fuzhou, Fujian Province on May 22nd, and 1996 died in Beijing on March 9th. 1953 graduated from the Mathematics Department of Xiamen University. From 65438 to 0957, he entered the Institute of Mathematics of China Academy of Sciences and studied number theory under the guidance of Professor Hua. He has been a researcher at the Institute of Mathematics of China Academy of Sciences, a member of the academic committee of the Institute, a professor at Guiyang University for Nationalities, Henan University, Qingdao University, Huazhong University of Science and Technology and Fujian Normal University, a member of the Mathematics Discipline Group of the State Science and Technology Commission, and the editor-in-chief of Mathematics Quarterly. Mainly engaged in the research of analytic number theory, and achieved international leading results in the research of Goldbach conjecture. This achievement is called Chen Theorem internationally and is widely cited. Together with Wang Yuan and Pan Chengdong, he won the first prize of National Natural Science 1978. Later, the above theorem was improved, and the article "Minimum Prime Number in arithmetic progression" was completed at the beginning of 1979, and the minimum prime number was pushed from the original 80 to 16, which was well received by the international mathematics community. The close relationship between combinatorial mathematics and modern economic management, scientific experiments, cutting-edge technology and human life is also studied. He has published more than 70 research papers and written books such as Interesting Talks on Mathematics and Combinatorial Mathematics.