Education
In 1719, Takebe"s new map of Japan was completed. And the work was highly valued for its quality and detail.
建部 賢弘
In 1719, Takebe"s new map of Japan was completed. And the work was highly valued for its quality and detail.
Takebe was the favorite student of Seki Takakazu Takebe is considered to have extended and disseminated Seki"s work. In 1706, Takebe was offered a position in the Tokugawa shogunate"s department of ceremonies. Shogun Yoshimune honored Takebe with rank and successively better positions in the shogunate.
Takebe played critical role in the development of the Enri (円理, "circle principle") - a crude analogon to the western calculus.
He also created charts for trigonometric functions. He obtained power series expansion of in 1722, 15 years earlier than Euler.
This was the first power series expansion obtained in Wasan. This result was first conjectured by heavy numeric computation.
He used Richardson extrapolation, about 200 years earlier than Richardson.
He also computated 41 digits of, based on polygon approximation and Richardson extrapolation. Takebe Prizes In the context of its 50th anniversary celebrations, the Mathematical Society of Japan established the Takebe Prize and the Takebe Prizes for the encouragement of young people who show promise as mathematicians.