Tsuruichi Hayashi

Mathematician. Born in Tokushima City. After attending Tokushima Middle School and Kyoto's Third High School, he graduated from the Department of Mathematics at the Faculty of Science, Tokyo Imperial University in 1897 (Meiji 30). After working as an assistant professor at the Faculty of Science and Technology, Kyoto Imperial University, a teacher at Matsuyama Middle School, and a lecturer at Tokyo Higher Normal School, he became a professor at the Department of Mathematics at Tohoku Imperial University in April 1911 (Meiji 44), and made a great contribution to solidifying the foundations of Tohoku University when it was first founded. He is known for his great stimulation of the mathematical world with the publication of Japan's first academic journal dedicated to mathematics (Tohoku Mathematical Journal), and for his research into Japanese mathematics, including the discovery that Seki Takakazu's "The Method of Solving Problems" included the theory of determinants. He also contributed greatly to mathematics education and enlightenment by publishing enlightening books on advanced mathematics such as probability theory, introduction to series, and projective geometry as part of the Mathematics Series published by Okura Shoten, by authoring algebra textbooks and geometry textbooks for secondary education (both published by Tokyo Kaiseikan) which were all the rage throughout the country from the end of the Meiji period to around 1935, and by serving as the first president of the Japan Society for Mathematical Education for Secondary Education (1919-1927).

[Shigeo Sasaki]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

数学者。徳島市に生まれる。徳島中学、京都の第三高等中学を経て、1897年（明治30）東京帝国大学理科大学数学科を卒業した。京都帝国大学理工科大学助教授、松山中学教諭、東京高等師範学校講師を経て、1911年（明治44）4月東北帝国大学数学科教授となり、創立当時の東北大学の基礎を固めるのに功績があった。日本最初の数学専門の学術誌（『東北数学雑誌』）の発行により数学界に大きな刺激を与えたことや、関孝和(せきたかかず)の「解伏題の法」が行列式の理論を含んでいることの発見など和算の研究で知られている。また、公算論、級数概論、射影幾何学などの高等数学の啓蒙(けいもう)書を大倉書店より数学叢書(そうしょ)として発行したこと、明治末期より昭和10年ごろにかけて全国を風靡(ふうび)した中等教育用の代数学教科書、幾何学教科書（ともに東京開成館発行）などの著者、初代の日本中等教育数学会会長（1919～1927）として数学教育、啓蒙に貢献した。

［佐々木重夫］

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