ChenJingrun (Traditional Chinese: 陳景潤; Simplified Chinese: 陈景润; pinyin: Chén Jǐngrùn, May 22, 1933 - March 19, 1996) was a mathematician from Fuzhou, Fujian, China.
Chen graduated from the Mathematics Department of Xiamen University in 1953.
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 either two primes, or a prime and a semiprime (the product of two primes)—e.g., 100 = 23 + 7·11.
Chen Shui-bian (born 1950; ch.: 陳水扁;, pinyin: Chén Shuǐbiǎn, Wade-Giles: Ch'en Shui-pien; Taiwanese Tân Chúi-píⁿ), colloquially and affectionately referred to as A-bian (阿扁; Ābiǎn; from Taiwanese A-píⁿ--a), was elected as the President of the Republic of China on Taiwan in March 2000 and took office in May 2000 with his Vice-President Annette Lu.
Chen was born to a tenant farming family in Kuantien Township of Tainan County in late 1950 but was not formally issued a birth certificate until February 1951 because of doubts that he would survive.
Chen's move to halt construction of the Number Four Nuclear Power Facility crested a legislative meltdown and is widely seen as the end of Chen's attempts to face the pan-blue groups head on.
Definition of mark chen(Site not responding. Last check: 2007-09-30)
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www.wordiq.com /search/mark+chen.html (507 words)
Chen Jingrun(Site not responding. Last check: 2007-09-30)
In a 1966 paper he proved is now called Chen's theorem : every sufficiently large even number can be written as sum of either two primes or a prime and a semiprime (the product of two primes)—e.g.
Chen's home page (http://www.math.ac.cn/Chinese/B/Chenjr/Chenjr.htm) (in Chinese) at the Chinese Institute of Mathematics (http://www.math.ac.cn/English/2/History.htm) (in English).
There is a wonderful musical synergy at play between the nominal leader of the session Levi Chen, who plays guitar and gu zheng, a Chinese harp (often simultaneously,) Michael Masley, who is predominantly a hammer dulcimer player and who has adopted some...
www.freeglossary.com /Jing-Run_Chen (420 words)
Chen (surname)(Site not responding. Last check: 2007-09-30)
Initial surname Chen was from Gui (Chinese:媯, pinyin: Gūi), which was an ancient Chinese surname of descendants of Emperor Shun, who was one of the Three August Ones and the Five Emperors.
Chen (state) during the Zhou Dynasty, was rewarded to a descendant of Shun by King Wu of Zhou.
Chen style Taijiquan is the senior family school of that well-known Chinese martial art.
Nel 1966, ChenJingrun dimostrò che esistono infiniti numeri primi p tali che p + 2 è o un primo o un semiprimo (cioè il prodotto di due primi).
L'approccio che adottò riguardava un argomento chiamato teoria del crivello, e gli consentì di trattare la congettura dei primi gemelli e la congettura di Goldbach in maniere simili.
Definendo un primo di Chen un numero primo p tale che p + 2 sia un primo o un semiprimo, Terence Tao e Ben Green dimostrarono nel 2005 che esistono infinite triplette di primi di Chen in progressione aritmetica.
Chen Kaige - Hutchinson encyclopedia article about Chen Kaige(Site not responding. Last check: 2007-09-30)
Chen is one of the ‘fifth generation’ of Chinese directors who graduated from the Beijing Film Academy in the early 1980s.
Chen acted in a cameo role in Bernardo Bertolucci's The Last Emperor 1987.
This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.
In 1966, ChenJingrun showed that there are infinitely many primes p such that p + 2 is either a prime or a semiprime (i.e., the product of two primes).
The approach he took involved a topic called sieve theory, and he managed to treat the twin primeconjecture and Goldbach's conjecture in similar manners.
Defining a Chenprime to be a prime p such that p + 2 is either a prime or a semiprime, Terence Tao and Ben Green showed in 2005 that there are infinitely many three term arithmetic progressions of Chenprimes.
Goldbach's conjecture - Wikipedia, the free encyclopedia(Site not responding. Last check: 2007-09-30)
In this approach, Goldbach's conjecture is the special case where a=1 and b=1; that is, when both numbers are prime.
ChenJingrun showed in 1966 that every sufficiently large even number can be written as the sum of either two primes, or a prime and a semiprime (the product of two primes)—e.g., 100 = 23 + 7·11.
H.A. Pogorzelski circulated a proof of the Goldbach conjecture in 1977, but this work is not generally accepted in mathematical circles.
News & Views - Top Mathematicians Worry About Future of China's Maths Studies (8/22/2002)(Site not responding. Last check: 2007-09-30)
Chen Mufa, a Chinese professor of mathematics who will deliver an hour-long plenary lecture during the nine-day conference, echoed Yau's comments.
After big names like Hua Luogeng, Shiing-shen Chern and ChenJingrun, China had hardly contributed any outstanding master mathematicians to world maths circles in the past two decades, said Wu Wenjun, a prominent member of the Chinese Academy of Sciences who is also chairman of the current ICM.
Professor Chen Mufa complained that he had been unable to recruit any Ph.D. students for more than five years and it seemed that no one wanted a doctorate in mathematics.
Deng shaking hands with ChenJingrun, a young mathematician, when meeting delegates to a National Conference on Science held in Beijing in March 1978.
In his speech at the opening ceremony he elaborated on the Marxist concept that science and technology are part of of the productive forces and declared that modernizing them was the key to modernizing agriculture, industry and defense.
Deng and Chen Yun at the Third Plenary Session of the Eleventh Central Committee in December 1978.
This result was subsequently improved by many authors; currently, the best known result is due to Ramaré, who in 1995 showed that every even number n ≥ 4 is in fact the sum of at most seven primes.
ChenJingrun showed in 1966 using the methods of sieve theory that every sufficiently large even number can be written as the sum of either two primes, or a prime and a semiprime (the product of two primes)—e.g., 100 = 23 + 7·11.
In 1975, Hugh Montgomery and Robert Charles Vaughan showed that "most" even numbers were expressible as the sum of two primes.
In the past 10 years, eight mathematicians, all of whom are members of the Chinese Academy of Sciences, had won the prize, including ChenJingrun, known for his research into Goldbach's theory.
The biennial prize was initially set up in 1992 in honor of late Chinese mathematician Hua Luogeng, who was noted for his pioneering research in mathematics.
In the past 10 years, eight mathematicians, all of whom are members of the Chinese Academy of Sciences, had won the prize, including ChenJingrun, known for his research into Gold Bach¡¯s theory.
This made international news because Noll and Nickel were still a high school students.
They claimed inspriation from a biography about ChenJingrun that they had read as 15 year-olds.
For the verification of this number alone, the pair used almost eight hours of time on a CDC Cyber 174 at Lawrence Livermore National Laboratory after cosuming over 400 hours of computer time in their search using a custom implementation of the Lucas-Lehmer test.
Chinese mathematicianChenJingrun achieved a world advanced position in 1977 in his calculation of the "Goldbach's conjecture." He proved that any sufficient even number could be the product of a prime number plus at most two other prime numbers (abbreviated as 1+2).
British mathematician Harbstein and a German mathematician referred to it as "Chen's theorem"in their book.
In 1979, Shi Fengshou, a 23-year-old student of China Science and Technology University, created a fast calculation method, which could conduct calculations of long numbers in plus, minus, multiplication, division, involution, evolution and fraction within a few seconds and get a correct answer.
Math Trek: Waring Experiments, Science News Online, July 17, 2004(Site not responding. Last check: 2007-09-30)
In 1940, S.S. Pillai showed that every integer can be expressed as a sum of 73 sixth powers.
The assertion that 37 fifth powers are sufficient was proved by ChenJingrun in 1964.
It wasn't until 1986 that Ramachandran Balasubramanian, François Dress, and Jean-Marc Deshouillers proved that no more than 19 fourth powers are needed.
