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Chen Jingrun
Chen Jingrun (; 22 May 1933 – 19 March 1996), also known as Jing-Run Chen, was a Chinese mathematician who made significant contributions to number theory, including Chen's theorem and the Chen prime. Life and career Chen was the third son in a large family from Fuzhou, Fujian, China. His father was a postal worker. Chen Jingrun graduated from the Mathematics Department of Xiamen University in 1953. His advisor at the Chinese Academy of Sciences was Hua Luogeng. His work on the twin prime conjecture, Waring's problem, Goldbach's conjecture and Legendre's conjecture led to progress in analytic number theory. In a 1966 paper he proved what is now called Chen's theorem: every sufficiently large even number can be written as the sum of a prime and a semiprime (the product of two primes) – e.g., 100 = 23 + 7·11. Despite being persecuted during the Cultural Revolution, he expanded his proof in the 1970s. After the end of the Cultural Revolution, Xu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chen (surname)
Chen () is a common Chinese-language surname and one of the most common surnames in Asia. It is the most common surname in Taiwan (2010) and Singapore (2000). Chen is also the most common family name in Guangdong, Zhejiang, Fujian, Macau, and Hong Kong. It is the most common surname in Xiamen, the ancestral hometown of many overseas Hoklo. Chen was listed 10th in the '' Hundred Family Surnames'' poem, in the verse 馮陳褚衛 ''(Féng Chén Chǔ Wèi)''. In Cantonese, it is usually romanized as Chan (e.g., Jackie Chan), most widely used by those from Hong Kong, and also found in Macau and Singapore. It is also sometimes spelled Chun. The spelling Tan usually comes from Southern Min dialects (e.g., Hokkien), while some Teochew dialect speakers use the spelling Tang. In Hakka and Taishanese, the name is spelled Chin. Spellings based on Wu include Zen and Tchen. There are many spellings based on its Hainanese pronunciations, including Dan, Seng, and Sin. In Viet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sufficiently Large
In the mathematical areas of number theory and analysis, an infinite sequence or a function is said to eventually have a certain property, if it does not have the said property across all its ordered instances, but will after some instances have passed. The use of the term "eventually" can be often rephrased as "for sufficiently large numbers", and can be also extended to the class of properties that apply to elements of any ordered set (such as sequences and subsets of \mathbb). Notation The general form where the phrase eventually (or sufficiently large) is found appears as follows: :P is ''eventually'' true for x (P is true for ''sufficiently large'' x), where \forall and \exists are the universal and existential quantifiers, which is actually a shorthand for: :\exists a \in \mathbb such that P is true \forall x \ge a or somewhat more formally: :\exists a \in \mathbb: \forall x \in \mathbb:x \ge a \Rightarrow P(x) This does not necessarily mean that any particular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pan Chengdong
Pan Chengdong ( zh, c=潘承洞, p=Pān Chéngdòng; 26 May 1934 – 27 December 1997) was a Chinese mathematician who made numerous contributions to number theory, including progress on Goldbach's conjecture. He was vice president of Shandong University and took the role of president from 1986 to 1997. Born in Suzhou, Jiangsu Province on 26 May 1934, he entered the Department of Mathematics and Mechanics of Peking University in 1952 and obtained a postgraduate degree in 1961 advised by Min Sihe, a student of Edward Charles Titchmarsh. He then went to work at the Department of Mathematics of Shandong University. He was honored with an Academician of the Chinese Academy of Science in 1991. Previously, Wang Yuan (mathematician), Wang Yuan made progress toward Goldbach’s Conjecture on the distribution of prime numbers. His result was that for any sufficiently large even number, that number is the sum of two numbers—one a product of at most ''two'' primes, the other a produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yuri Linnik
Yuri Vladimirovich Linnik (; January 8, 1915 – June 30, 1972) was a Soviet mathematician active in number theory, probability theory and mathematical statistics. Biography Linnik was born in Bila Tserkva, in present-day Ukraine. He went to Saint Petersburg University where his supervisor was Vladimir Tartakovsky, and later worked at that university and the Steklov Institute. He was a member of the Academy of Sciences of the Soviet Union, as was his father, Vladimir Pavlovich Linnik. He was awarded both Stalin and Lenin Prizes. He died in Leningrad. Work in number theory * Linnik's theorem in analytic number theory * The dispersion method (which allowed him to solve the Titchmarsh problem). * The large sieve (which turned out to be extremely influential). * An elementary proof of the Hilbert-Waring theorem; see also Schnirelmann density. * The Linnik ergodic method, see , which allowed him to study the distribution properties of the representations of integers by integr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matti Jutila
Matti Ilmari Jutila (born 1943) is a mathematician and a professor emeritus at the University of Turku. He researches in the field of analytic number theory. Education and career Jutila completed a doctorate at the University of Turku in 1970, with a dissertation related to Linnik's constant supervised by . Jutila's work has repeatedly succeeded in lowering the upper bound for Linnik's constant. He is the author of a monograph, ''Lectures on a method in the theory of exponential sums'' (1987). He has been a member of the Finnish Academy of Science and Letters The Finnish Academy of Science and Letters (; ) is a Finnish learned society. It was founded in 1908 and is thus the second oldest academy in Finland. The oldest is the Finnish Society of Sciences and Letters, which was founded in 1838. Member ... since 1982. References External links * 1943 births Living people Finnish mathematicians Number theorists Members of the Finnish Academy of Science and Letters< ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Gustav Lejeune Dirichlet
Johann Peter Gustav Lejeune Dirichlet (; ; 13 February 1805 – 5 May 1859) was a German mathematician. In number theory, he proved special cases of Fermat's last theorem and created analytic number theory. In analysis, he advanced the theory of Fourier series and was one of the first to give the modern formal definition of a function. In mathematical physics, he studied potential theory, boundary-value problems, and heat diffusion, and hydrodynamics. Although his surname is Lejeune Dirichlet, he is commonly referred to by his mononym Dirichlet, in particular for results named after him. Biography Early life (1805–1822) Gustav Lejeune Dirichlet was born on 13 February 1805 in Düren, a town on the left bank of the Rhine which at the time was part of the First French Empire, reverting to Prussia after the Congress of Vienna in 1815. His father Johann Arnold Lejeune Dirichlet was the postmaster, merchant, and city councilor. His paternal grandfather had come to Düren from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroid
An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). Asteroids are rocky, metallic, or icy bodies with no atmosphere, and are broadly classified into C-type asteroid, C-type (carbonaceous), M-type asteroid, M-type (metallic), or S-type asteroid, S-type (silicaceous). The size and shape of asteroids vary significantly, ranging from small rubble piles under a kilometer across to Ceres (dwarf planet), Ceres, a dwarf planet almost 1000 km in diameter. A body is classified as a comet, not an asteroid, if it shows a coma (tail) when warmed by solar radiation, although recent observations suggest a continuum between these types of bodies. Of the roughly one million known asteroids, the greatest number are located between the orbits of Mars and Jupiter, approximately 2 to 4 astronomical unit, AU ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Statue Of Chen Jingrun
A, or a, is the first letter and the first vowel letter of the Latin alphabet, used in the modern English alphabet, and others worldwide. Its name in English is '' a'' (pronounced ), plural ''aes''. It is similar in shape to the Ancient Greek letter alpha, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version is often written in one of two forms: the double-storey and single-storey . The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English, '' a'' is the indefinite article, with the alternative form ''an''. Name In English, the name of the letter is the ''long A'' sound, pronounced . Its name in most other languages matches the letter's pronunciation in open syllables. History The earliest known ancestor of A is ''aleph''—the first letter of the Phoenician ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pneumonia
Pneumonia is an Inflammation, inflammatory condition of the lung primarily affecting the small air sacs known as Pulmonary alveolus, alveoli. Symptoms typically include some combination of Cough#Classification, productive or dry cough, chest pain, fever, and Shortness of breath, difficulty breathing. The severity of the condition is variable. Pneumonia is usually caused by infection with viruses or bacteria, and less commonly by other microorganisms. Identifying the responsible pathogen can be difficult. Diagnosis is often based on symptoms and physical examination. Chest X-rays, blood tests, and Microbiological culture, culture of the sputum may help confirm the diagnosis. The disease may be classified by where it was acquired, such as community- or hospital-acquired or healthcare-associated pneumonia. Risk factors for pneumonia include cystic fibrosis, chronic obstructive pulmonary disease (COPD), sickle cell disease, asthma, diabetes, heart failure, a history of smoking, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Daily
The ''People's Daily'' ( zh, s=人民日报, p=Rénmín Rìbào) is the official newspaper of the Central Committee of the Chinese Communist Party (CCP). It provides direct information on the policies and viewpoints of the CCP in multiple languages. It is the largest newspaper in the China, People's Republic of China (PRC). History The paper was established on 15 June 1948 and was published in Pingshan County, Hebei. It was formed from the merger of the ''Jin-Cha-Ji Daily'' and the newspapers of the Jin-Ji-Lu-Yu base area. On 15 March 1949, its office was moved to Beijing, and the original People's Daily Beijing edition was renamed ''Beijing Liberation Daily''. The newspaper ceased publication on 31 July 1949, with a total of 406 issues published. Since the newspaper was the official newspaper of the North China Central Bureau of the CCP, it was historically known as the ''North China People's Daily'' or the ''People's Daily North China Edition''. At the same time, in order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Literature
''People's Literature'' (《人民文学》''Renmin wenxue'') is the oldest continuously published literary magazine in China, and the first literary magazine published in Communist China. Established in 1949, the magazine is published by the People's Literature Publishing House and issued by the Chinese Writers Association. Its head office is located at 166 Chaonei Ave, Beijing. Its current director is Pan Kaixiong (潘凯雄) and its current editor-in-chief is Guan Shiguang (管士光). History Establishment People's Literature was first established in 1949, as part of the outset of the ‘Seventeen-Year’ period in Chinese literature, referring to the seventeen years between the establishment of the People's Republic of China, and the Cultural Revolution. The First Congress of Literary and Art Workers (2–19 July 1949) brought together the cultural, artistic, and political representatives that would form the All China Federation of Literary and Art Circles, under which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
