What achievements has Xu Guangqi made in mathematics?

Xu Guangqi reflected on the reasons for the backwardness of mathematics in China and discussed the wide application of mathematics. He put forward the practical idea of "the study of degrees", which had an important impact on the modernization of science in China. He is also the author of two books, Pythagorean and Measuring Similarities and Differences. Anyone who has studied mathematics knows that it has a sub-discipline called "geometry", but they don't necessarily know how the name "geometry" came from.

In ancient China, this sub-discipline of mathematics was called "metaphysics". The word "geometry" was not originally a mathematical proper noun in Chinese, but a virtual word, meaning "how much". For example, in Cao Cao's famous "Short Song Xing" during the Three Kingdoms, "When you sing about wine, what is your life?"

This "geometry" means how much. Xu Guangqi was the first to use the word "geometry" as a technical term in mathematics, and used it to refer to this mathematics sub-discipline. In addition, he translated Euclid's Geometric Primitives.

It was not until the beginning of the 20th century that the imperial examination was abolished in China, schools were established, and elementary geometry, with the content of the "Geometry Original" as the main content, became a compulsory subject in secondary schools.

Xu Guangqi was a scientist in the late Ming Dynasty of China, proficient in agriculture, politics, and military affairs. The "Complete Book of Agricultural Administration" compiled by him has played a tremendous role in promoting the development of agricultural technology in China. He also translated many Western scientific works, introduced the advanced natural science and technology of the West to China, and was the enlightenment master of modern science in China.

In the books "The Meaning of Measurement", "Similarities and Differences in Measurement" and "Pythagorean Meaning", Xu Guangqi used the principles of Western geometry to sort out the classic works of traditional mathematics, "Zhou Ji Sutra" and "Nine Chapters of Arithmetic Liang Cover", and found that the defect of traditional mathematics is "only the law, not the meaning", that is, only the method of solving, not the reason for the solution, thus initially revealing the essential characteristics of traditional mathematics as an empirical science, and thus germinating a strong desire to create a scientific system of "reason, righteousness, law, and number". Of course, as a practical scientist, Xu Guangqi's research and writings are not only to satisfy his own desire for knowledge, but also to guide the practical activities of transforming and conquering nature. Just as he said in the "Pythagorean Preface", "The river in the northwest and the water conservancy in the southeast are all the best measures to save the time."

This law cannot be abolished." These achievements of Western science can play a role in production practice and produce efficiency.

In the books "Similarities and Differences in Measurement" and "Pythagorean Meaning", Xu Guangqi used the principles of Western geometry to sort out the classic works of traditional mathematics, "Zhou Ji Suanjing" and "Nine Chapters of Arithmetic", and found that the defect of traditional mathematics is "only the law, not the meaning", that is, only the method of solving, not the reason for the solution, thus initially revealing the essential characteristics of traditional mathematics as an empirical science, and thus germinating a strong desire to create a scientific system of "reason, luck, law, and number".

Xu Guangqi April 24, 1562 - November 1633 was shouting 10 days.

This can be searched.,Please put the question on the infiltration.,Raise your eyes and raise your hair completely.。

April 1562.

Xu Guangqi (, Zixian, Xuanhu, Han nationality, famous scientist and politician in the Ming Dynasty. The official is the secretary of the Ministry of Rites of the Chongzhen Dynasty and the scholar of Wenyuan Pavilion and the second assistant of the cabinet.