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# A great mathematician Chen Jingrun

Photo of Chen Jingrun from the website: http://city.chinaassistor.com.
I am not familiar with his work, but I found the story of Chen Jingrun (1933-1996) fascinating. He graduated from Xiamen University in 1953 became researcher at the Chinese Academy of Sciences. His work led to progress in analytic number theory. His Chinese home page is at the Chinese Institute of Mathematics. A short biography "A great mathematician Chen Jingrun" is on http://city.chinaassistor.com/. His 1966 paper was on ""On the representation of a large even integer as the sum of a prime and the product of at most two primes". The cultural revolution put a halt to research, so Chen's 1966 Theorem was not made public until 1973. His work continues to be relevant to recent research in number theory. Mathematician Jason Dyer reports on "Carnival of Mathematics #43" in the blog "The Number Warrior". He explains why the number 47 is a Chen prime. He also introduces Roth’s theorem, linking to a paper "Restriction theory of the Selberg sieve, with applications" by Ben Green and Terence Tao, which is available as a free PDF file or PostScript file from arXiv.org.

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Comment by Colin McAllister on May 26, 2009 at 2:49pm

I discovered the following story at "Extraordinary Chinese Sayings, 1840-1999 - Part 1", from the book Extraordinary Sayings (非常道) by Yu Shicun (余世存). During the Cultural Revolution, the people criticizing Chen Jingrun (陈景润) said: "Let the Goldbach conjecture go to hell! What is so big deal about 1+2? Isn't 1+2 equal to 3? You eat the food grown by peasants, you live in a house built by workers, you are protected by the People's Liberation Army and your wages are paid by the nation so that you can study 1+2. What is this? This is fake science!" So Chen jumped on the table, went through the open window and leapt downwards. But when he jumped out of the third-floor window, he was nicked by an awning and therefore only suffered some scratches on his leg when he landed on the ground. A rebel leader looked at Chen and said: "It is no wonder that you are a famous mathematician. You even know how to select the angle when you jump out of the window!"
Comment by Colin McAllister on June 12, 2009 at 3:37pm

A 1999 stamp commemorating Chen Jing-run. Link via Wikipedia article. Follow this link for more Images of Mathematicians on Postage Stamps. The newest stamp on this list is a 2009 Arithmetic stamp from Portugal.
Comment by Rashmi Kathuria on June 12, 2009 at 6:35pm
Thanks for sharing this information.
Comment by Colin McAllister on June 29, 2009 at 4:25pm
As reported in How Chinese's idols have changed: On February 17 1978, People's Daily and Guangming Daily introduced Xu Chi's article "Goldbach Conjecture" from People's literature. This was the day when hundreds of millions of Chinese learned of Chen Jingrun, who was honored as China's "jewel in the mathematical crown".

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