Shing-Tung Yau , (born April 4, 1949) is a Chinese-born American mathmatician. He won the Fields Medal in 1982.Yau's work is mainly in differential geometry, especially in geometric analysis. His contributions have had an influence on both physics and mathematics and he has been active at the interface between geometry and theoretical physics. His proof of the positive energy theorem in general relativity demonstrated—sixty years after its discovery—that Einstein's theory is consistent and stable. His proof of the Calabi conjecture allowed physicists—using Calabi–Yau compactification—to show that string theory is a viable candidate for a unified theory of nature. Calabi–Yau manifolds are among the ‘standard toolkit’ for string theorists today.
Yau is one of the world's greatest mathematician in differential geometry nowadays,and he changed the whole world of geometry by developing the geometric analysis-using pde as a tool to solve geometric problems.He is one of the few people who won Fields Prize and Wolf Prize.His job is really great.What's more,he also did a lot of things for Chinese mathematics.Although some people have some different opinions.But I think he is a good mathematician.
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