Masayoshi Nagata

Masayoshi Nagata (Japanese永田 雅 宜, Masayoshi Nagata, born February 9, 1927 in Aichi Prefecture, † August 27 2008 in Kyoto ) was a Japanese mathematician who is known for his work in commutative algebra and algebraic geometry.

In 1959 he published a counter-example, which solved the 14th Hilbert problem and also answered the underlying question invariantentheoretische.

Numerous other counter-examples of commutative algebra and algebraic geometry go back to him. For example, he showed that complete algebraic varieties exist, which are not projective.

In 1958 he was invited speaker at the International Congress of Mathematicians in Edinburgh ( On the fourteenth of problem- Hilbert ). One of his students at the University of Kyoto was Shigefumi Mori.