author
Teijiro Takagi
A pioneer of modern Japanese mathematics, he is best remembered for major work in number theory and class field theory. His ideas left a lasting mark on the subject, and even the Takagi curve carries his name.
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About the author
Born in Gifu Prefecture in 1875, Teiji Takagi became one of Japan's most important mathematicians. He studied at Tokyo Imperial University, then continued his work in Germany, where he was influenced by leading mathematicians of the time.
Takagi is best known for foundational results in class field theory, especially the theorem often called the Takagi existence theorem. He also gave his name to the Takagi curve, a famous example of a continuous function that is nowhere differentiable.
Beyond his own research, he played a major role in building modern mathematics in Japan. He taught at Tokyo Imperial University and is often described as a founder of the Japanese school of modern mathematics.