Mathematician and educator, formerly known as Yang, posthumous title Wu Zhi. 1April, 896 14 was born in Hefei, Anhui. Long-term President or Acting Director of the Department of Mathematics in Tsinghua University and The National SouthWest Associated University. He is the father of Yang Zhenning, a scholar engaged in the teaching and research of modern number theory and algebra in China in his early days and a Nobel Prize winner. His father, Yang, a scholar in the late Qing Dynasty, taught in a private school in his early years. Later, I went to Tianjin and worked as a pen in Duan shogunate. 1907, Duan lost power and went home for leisure. The next year, I wanted to find a job in Shenyang, but unfortunately I caught the plague in the hotel and died. Yang Wuzhi's mother, surnamed Wang, died young when he was 9 years old (1905). Therefore, Mr. and Mrs. Yang don't take much care of them, and most of their lives are arranged by their uncle Yang Bangrui. 19 14, Yang Wuzhi graduated from Anhui No.2 Middle School. This is a very good school, which has laid a good cultural foundation for Yang Wuzhi. That autumn, I was admitted to the preparatory course of Beijing Normal University for one year, and then entered the undergraduate course of Mathematics and Science Department. It is required to study for 3 years and graduate from 19 18. This degree was the highest level of normal education at that time, and all localities rushed to hire it. Finally, Yang Wuzhi decided to return to his alma mater, Anhui No.2 Middle School, as a teacher and supervisor (subject director). Yang Wuzhi, a young man, practices strict discipline in her school and strictly controls a group of dude. The school stipulates that the school gate will be closed at night 10, and a group of students who have fun outside and come back late will not be allowed in. As a result, some students who didn't want to make progress were very dissatisfied with Yang Wuzhi, the invigilator, and even made trouble, ready to take revenge by force. After the trouble, because the parents of the students are partial to the students who make trouble, I hope it will stop. Yang Wuzhi resigned in a fit of pique and transferred to Anqing Middle School to teach. This incident deeply stimulated him, and he found it difficult for a scholar to deal with corrupt governments, local tyrants and evil gentry. Therefore, Yang Wuzhi put forward the idea of "saving the country through science", hoping to change the dark reality in China, revitalize science in China and promote Chinese civilization by studying abroad. During my teaching in Anqing, I actively prepared for the examination for studying abroad. In his early years, he got engaged to Luo, the daughter of fellow countryman Luo Zhuquan, and got married in 19 19. Luo culture is not high, and he has been doing housework. There is a deep affection between this couple, and they will never change. 1922, the eldest son Yang Zhenning was born. Yang Wuzhi's preparation for the exam has also reached a tense stage. 1in the spring of 923, Yang Wuzhi successfully passed the Anhui public study abroad examination. Then he left his wife and son, who was less than one year old, and went to America to study alone. He first went to Stanford University in the western United States to study for three academic years and got a bachelor's degree. Then in the autumn of 1924, I transferred to the University of Chicago for further study. At that time, the mathematics department of the University of Chicago had reached the first-class level in the United States, and Yang Wuzhi studied algebra and number theory under the famous L.E. Dixon. 1926 obtained the master's degree with the article Bilinear Invariants. Two years later, Yang Wuzhi became the first person to study China's factor theory and became a doctor of "Various Generalizations of Hualin Problem". /kloc-in the autumn of 0/928, Yang Wuzhi returned to China after finishing her studies. He first taught at Xiamen University for one year, and was hired as a professor of mathematics by Tsinghua University the following year. Since then, Yang Wuzhi has been teaching in Tsinghua University (including Southwest United University during the Anti-Japanese War) until liberation. After 1950, he stayed in Shanghai Fudan University as a professor of mathematics. 1may, 973 12, died in Shanghai. Yang Wuzhi's main academic contribution is the study of number theory, especially his work on the Waring problem. China's research on number theory has a long history. Sun Tzu's theorem, China's remainder theorem and Qin's indefinite equation theory are all world-famous masterpieces. But by the Ming and Qing dynasties, the study of number theory had fallen far behind Europe. By the 1920s, Yang Wuzhi should be the first person who can study modern number theory and publish creative papers in China. Yang Wuzhi has been engaged in mathematics education all his life, especially in Tsinghua University and The National SouthWest Associated University, where he teaches and presides over department affairs. He trained and brought up two generations of mathematical talents, and made great contributions to modern mathematics in China. 65438-0928, Tsinghua Preparatory School for Studying in the United States was transformed into Tsinghua University. Zheng and Xiong Qinglai came to Tsinghua University to teach in advance. 1928 and 1929, Sun Guangyuan and Yang Wuzhi also arrived at the school. These four professors, together with two faculty members, Tang Peijing and Zhou Hongjing, have a huge lineup. 1930, Chen Shengshen studied geometry with Sun Guangyuan. The next year, Hua came to school to learn number theory. Later students came from Xu and Zhao Ke. In the first half of 1930s, Tsinghua University became the strongest mathematical center in China. Yang Wuzhi taught many algebra courses in Tsinghua University, especially the group theory course in the early 1930s, which influenced a large number of post-scholars. After the Anti-Japanese War, Tsinghua University, Peking University and Nankai University merged into The National SouthWest Associated University. Yang Wuzhi is also the head of the Department of Mathematics of Tsinghua University and the director of the graduate department of Mathematics. Life during wartime is very hard, but the academic life of the Department of Mathematics in The National SouthWest Associated University is not bad, and the scientific level is constantly improving, which is inseparable from the organization and leadership of Yang Wuzhi. As we all know, Hua and Hua are self-taught and set foot on the campus of Tsinghua, but it is difficult to find out the details of Hua in the mathematics field of Tsinghua campus. It should be said that Mr. Tang Peijing, Mr. Wang and Mr. Xiong Qinglai have all made efforts for China to come to Tsinghua, and the support of Xiong Qinglai, the head of the department, is the key measure. After Hua came to Tsinghua University, he chose number theory as his research direction and focused on problems, which was obviously directly influenced by him. Hua Zai 1980 wrote to Wide Angle Mirror Weekly in Hong Kong, saying, "It was the professor who led me to the road of number theory." Hua Yu 1936 went to England to learn analytic number theory from Hardy, and achieved remarkable results. Yang Wuzhi is glad that his students have surpassed him. 1938 Hua returned to China to teach in The National SouthWest Associated University. In spite of all kinds of objections in the school, the then dean proposed to make an exception and promote Hua to the school, that is, skip lecturers and associate professors and become full professors. At first, the school rejected Hua because he didn't get a doctorate in Britain, but after hard work, he was finally approved. Therefore, Hua also wrote in the above-mentioned letter to the wide-angle lens: "It was the professor who directly mentioned that I was a full professor after returning from England without a lecturer or associate professor." During his stay in The National SouthWest Associated University, Hehua once lived in Datangzi Village in the northwest suburb of Kunming. The two families used to be closely related. At that time, Hua wrote a letter to me, which said: "The ancients said: Those who gave birth to me, those whose parents know me, are uncles and treasures. My uncle Bao is Yang Shiye. " The Dixon School studied by Yang Wuzhi had a great influence in the United States at the beginning of this century. Later, due to the rise of analytic number theory in Britain, the Soviet Union and other countries, it gradually declined. Therefore, although Yang Wuzhi inspired and promoted the study of number theory, unfortunately, it failed to exert a significant influence due to the decline of Dixon School. Under the leadership of China, China School of Number Theory has made great progress. People will miss Yang Wuzhi's early pioneering role. /kloc-at the end of 0/948, Yang Wuzhi flew back to Nanjing from Beiping and went to Kunming to meet his family in Shanghai, striving for liberation. 1950 Tsinghua didn't renew Yang Wuzhi, so he stayed in Shanghai and became a professor of mathematics at Fudan University. Tsinghua University's dismissal was a great blow to Yang Wuzhi. In the 1950s, he also taught several courses at Fudan University, and later rested at home because of diabetes. 1957, Yang Wuzhi's eldest son, Yang Zhenning, won the Nobel Prize in physics, which made Yang Wuzhi very excited. He stayed in Geneva three times, at 1957, 1960 and 1964. He got together with Yang Zhenning in Geneva and met old friends and students overseas, such as Chen Shengshen. These gatherings made Yang Zhenning know more about New China, which directly influenced his decision to go back to the mainland to visit relatives in the summer of 197 1, and Yang Zhenning became one of the first famous overseas scholars to visit People's Republic of China (PRC). Yang Wuzhi was in poor health in his later years and seldom went out. He loves traditional culture, especially Weiqi. He doesn't have many poems, one of which is for Chen Shengshen. Poem says: It's really a lead to travel far and wide. The sages have many talents today, and they have climbed the baizhang building alone. Visiting masters in Hamburg and Paris, learning art and forestry are deeply rooted in marine plants. Pucheng inherited Gao Qi's skills and added a new athlete to the history of this field. Yang Wuzhi often says that he likes the word "pure" in his name. Indeed, he is pure and generous, and has become a word-of-mouth resume of people in the mathematical circle. April 1896 was born in Hefei, Anhui. 19 14 graduated from Anhui No.2 Middle School. 1914-1918 graduated from Beijing normal university, majoring in preparatory courses and mathematics. 1918-1922 used to be a teacher in Anhui No.2 Middle School and Anqing Middle School. 1923 to 1928 went to study in the United States and obtained master's and doctor's degrees from the University of Chicago. 1928- 1929 Professor of Xiamen University. Professor Tsinghua University from 1929 to 1937. 1937 ——1946 professor The National SouthWest Associated University. Professor Tsinghua University from 1946 to 1949. 1950 ——1973 Professor, Fudan University, Shanghai. 1973 died in Shanghai on May 2nd. The main thesis is 1 yanggequan. Invariants in the form of billions, the dissipation of master's degree in science. Chicago. 1926.2 Yang Gaoquan. Various generalizations of waring theorem. Chi Icago, 1928 (paper, Ch i c a go, 1928). Yang Kechang. Representing positive integers with pyramid numbers, … Tsinghua University Science Report, 193 1, A 1: 9— 15.4 Yang Kechang. Secondary field and explicit S algorithm. Tsinghua University Scientific Report 1935, A 1: 26 1-264.5 Yang Wuzhi.