Leetsch C. Hsu
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Leetsch C. Hsu
Xu Lizhi (; 23 September 1920 – 11 March 2019), better known as Leetsch Charles Hsu, was a Chinese mathematician and educator. He co-founded the Department of Mathematics of Jilin University and founded the Institute of Applied Mathematics and the ''Journal of Mathematical Research with Applications'' at the Dalian University of Technology. Together with American mathematician Henry W. Gould, he established the Gould–Hsu Matrix Inversion Formula in 1973. Early life and education Hsu was born on 23 September 1920 in Zhangjiagang, Jiangsu, Republic of China. His original name was Xu Quanyong (). Hsu studied at Jiangsu Provincial Luoshe Normal School before the outbreak of the Second Sino-Japanese War. In 1940, he passed the entrance examination for the temporary National Southwestern Associated University formed by Tsinghua University, Tsinghua and other universities in Kunming, and studied mathematics under Hua Luogeng and Pao-Lu Hsu. Upon graduation in 1945, he was hired b ...
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Xu (surname 徐)
Xu () is a Chinese surname, Chinese-language surname. In the Wade-Giles system of Romanization of Chinese, romanization, it is spelled as "Hsu", which is commonly used in Taiwan. It is different from Xu (surname 許), represented by a different character. Variations in other Chinese varieties and languages In Wu Chinese including Shanghainese, the surname 徐 is transcribed as Zee, as seen in the historical place name Zikawei in Shanghai (Xujiahui in Pinyin). In Gan Chinese, it can be spelled Hi or Hé. In Cantonese, 徐 is often transcribed as Tsui, T'sui, Choi, Chui or even Tsua. In modern Vietnamese language, Vietnamese, the character 徐 is written Từ and Sy when migrating to the English-speaking World, particularly the United States. Other spellings include Hee and Hu. In Japanese language, Japanese, the surname 徐 is transliterated as Omomuro (kunyomi) or Jo (onyomi or Sino-Japanese). In Korean, 徐 is romanized as Seo in the Revised Romanization of Korean and writt ...
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University Of Aberdeen
The University of Aberdeen ( sco, University o' 'Aiberdeen; abbreviated as ''Aberd.'' in List of post-nominal letters (United Kingdom), post-nominals; gd, Oilthigh Obar Dheathain) is a public university, public research university in Aberdeen, Scotland. It is an Ancient universities of Scotland, ancient university founded in 1495 when William Elphinstone, Bishop of Aberdeen and Lord Chancellor of Scotland, Chancellor of Scotland, petitioned Pope Alexander VI on behalf of James IV of Scotland, James IV, King of Scots to establish King's College, Aberdeen, King's College, making it Scotland's 3rd oldest university and the 5th oldest in the English-speaking world and the United Kingdom. Aberdeen is consistently ranked among the top 160 universities in the world and is ranked within the top 20 universities in the United Kingdom according to ''The Times'' and ''The Sunday Times'', and 13th in the UK according to ''The Guardian''. The university comprises three colleges—King's College ...
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Monographs
A monograph is a specialist work of writing (in contrast to reference works) or exhibition on a single subject or an aspect of a subject, often by a single author or artist, and usually on a scholarly subject. In library cataloging, ''monograph'' has a broader meaning—that of a nonserial publication complete in one volume (book) or a definite number of volumes. Thus it differs from a serial or periodical publication such as a magazine, academic journal, or newspaper. In this context only, books such as novels are considered monographs.__FORCETOC__ Academia The English term "monograph" is derived from modern Latin "monographia", which has its root in Greek. In the English word, "mono-" means "single" and "-graph" means "something written". Unlike a textbook, which surveys the state of knowledge in a field, the main purpose of a monograph is to present primary research and original scholarship ascertaining reliable credibility to the required recipient. This research is prese ...
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Richard Nixon
Richard Milhous Nixon (January 9, 1913April 22, 1994) was the 37th president of the United States, serving from 1969 to 1974. A member of the Republican Party, he previously served as a representative and senator from California and was the 36th vice president from 1953 to 1961 under President Dwight D. Eisenhower. His five years in the White House saw reduction of U.S. involvement in the Vietnam War, détente with the Soviet Union and China, the first manned Moon landings, and the establishment of the Environmental Protection Agency and Occupational Safety and Health Administration. Nixon's second term ended early, when he became the only president to resign from office, as a result of the Watergate scandal. Nixon was born into a poor family of Quakers in a small town in Southern California. He graduated from Duke Law School in 1937, practiced law in California, then moved with his wife Pat to Washington in 1942 to work for the federal government. After active duty ...
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Combinatorics
Combinatorics is an area of mathematics primarily concerned with counting, both as a means and an end in obtaining results, and certain properties of finite structures. It is closely related to many other areas of mathematics and has many applications ranging from logic to statistical physics and from evolutionary biology to computer science. Combinatorics is well known for the breadth of the problems it tackles. Combinatorial problems arise in many areas of pure mathematics, notably in algebra, probability theory, topology, and geometry, as well as in its many application areas. Many combinatorial questions have historically been considered in isolation, giving an ''ad hoc'' solution to a problem arising in some mathematical context. In the later twentieth century, however, powerful and general theoretical methods were developed, making combinatorics into an independent branch of mathematics in its own right. One of the oldest and most accessible parts of combinatorics is gra ...
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Approximation Theory
In mathematics, approximation theory is concerned with how function (mathematics), functions can best be approximation, approximated with simpler functions, and with quantitative property, quantitatively characterization (mathematics), characterizing the approximation error, errors introduced thereby. Note that what is meant by ''best'' and ''simpler'' will depend on the application. A closely related topic is the approximation of functions by generalized Fourier series, that is, approximations based upon summation of a series of terms based upon orthogonal polynomials. One problem of particular interest is that of approximating a function in a computer mathematical library, using operations that can be performed on the computer or calculator (e.g. addition and multiplication), such that the result is as close to the actual function as possible. This is typically done with polynomial or Rational function, rational (ratio of polynomials) approximations. The objective is to make t ...
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Asymptotic Analysis
In mathematical analysis, asymptotic analysis, also known as asymptotics, is a method of describing limiting behavior. As an illustration, suppose that we are interested in the properties of a function as becomes very large. If , then as becomes very large, the term becomes insignificant compared to . The function is said to be "''asymptotically equivalent'' to , as ". This is often written symbolically as , which is read as " is asymptotic to ". An example of an important asymptotic result is the prime number theorem. Let denote the prime-counting function (which is not directly related to the constant pi), i.e. is the number of prime numbers that are less than or equal to . Then the theorem states that \pi(x)\sim\frac. Asymptotic analysis is commonly used in computer science as part of the analysis of algorithms and is often expressed there in terms of big O notation. Definition Formally, given functions and , we define a binary relation f(x) \sim g(x) \qu ...
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Nanjing University Of Aeronautics And Astronautics
The Nanjing University of Aeronautics and Astronautics (NUAA, ), colloquially known as Nanhang (南航), is a public research university in Nanjing, China. One of the Seven Sons of National Defence, it is directly supervised by the Ministry of Industry and Information Technology. The university is part of the Project 211 and a Chinese state Double First Class University Plan university identified by the Ministry of Education of China. NUAA is a selective university that usually admits top 2% students in the National College Entrance Examination of China. It is ranked among the top 250 universities globally for Mechanical, Aeronautical and Manufacturing Engineering in the QS World University Rankings. It is also among the top 300 institutions of Asia, according to QS World University Rankings and Times Higher Education World University Rankings. According to some rankings in 2021, NUAA ranked within the 301-400 band globally. History Founded in October, 1952, as the Nanjing Coll ...
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Texas A&M University
Texas A&M University (Texas A&M, A&M, or TAMU) is a public, land-grant, research university in College Station, Texas. It was founded in 1876 and became the flagship institution of the Texas A&M University System in 1948. As of late 2021, Texas A&M has the largest student body in the United States, and is the only university in Texas to hold simultaneous designations as a land, sea, and space grant institution. In 2001, it was inducted into the Association of American Universities. The university's students, alumni, and sports teams are known as Aggies, and its athletes compete in eighteen varsity sports as a member of the Southeastern Conference. The university was the first public higher-education institution in Texas; it opened for classes on October 4, 1876, as the Agricultural and Mechanical College of Texas (A.M.C.) under the provisions of the 1862 Morrill Land-Grant Act. In the following decades, the college grew in size and scope, expanding to its largest enrol ...
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Huazhong University Of Science And Technology
The Huazhong University of Science and Technology (HUST; ) is a public research university located in Guanshan Subdistrict, Hongshan District, Wuhan, Hubei province, China. As a national key university directly affiliated to the Ministry of Education of China, HUST is a Project 985 and Class A Double First Class University. HUST manages ''Wuhan National Laboratories for Opto-electronics'' (''WNLO''), which is one of the five national laboratories in China. HUST is also one of four Chinese universities eligible to run the national laboratory and the national major science and technology infrastructure. Huazhong University of Science and Technology was one of two Chinese universities awarded with the University Leadership Award by the Society of Manufacturing Engineers (SME), and elected as "China's Top Ten Research Institutions" by the academic journal ''Nature'', called "The epitome of the higher education development of People's Republic of China". Huazhong University of Sc ...
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Computational Mathematics
Computational mathematics is an area of mathematics devoted to the interaction between mathematics and computer computation.National Science Foundation, Division of Mathematical ScienceProgram description PD 06-888 Computational Mathematics 2006. Retrieved April 2007. A large part of computational mathematics consists roughly of using mathematics for allowing and improving computer computation in areas of science and engineering where mathematics are useful. This involves in particular algorithm design, computational complexity, numerical methods and computer algebra. Computational mathematics refers also to the use of computers for mathematics itself. This includes mathematical experimentation for establishing conjectures (particularly in number theory), the use of computers for proving theorems (for example the four color theorem), and the design and use of proof assistants. Areas of computational mathematics Computational mathematics emerged as a distinct part of applied ma ...
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Changchun
Changchun (, ; ), also romanized as Ch'angch'un, is the capital and largest city of Jilin Province, People's Republic of China. Lying in the center of the Songliao Plain, Changchun is administered as a , comprising 7 districts, 1 county and 3 county-level cities. According to the 2020 census of China, Changchun had a total population of 9,066,906 under its jurisdiction. The city's metro area, comprising 5 districts and 1 development area, had a population of 5,019,477 in 2020, as the Shuangyang and Jiutai districts are not urbanized yet. It is one of the biggest cities in Northeast China, along with Shenyang, Dalian and Harbin. The name of the city means "long spring" in Chinese. Between 1932 and 1945, Changchun was renamed Xinjing () or Hsinking by the Kwantung Army as it became the capital of the Imperial Japanese puppet state of Manchukuo, occupying modern Northeast China. After the foundation of the People's Republic of China in 1949, Changchun was established as the provi ...
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