Study on books and manuscripts left by Nishida Akinori from the point of view of mathematical history

西田昭宪，研究旧数学关的学校，所谓的“和三”，在他的青年，在江户时代的最后一个时期，他的晚年致力于国防在明治时代，并留下书籍的和三在御茶水大学图书馆。本文介绍了日本江户初期数学家关高和的生平和著作，他是世界上第一个研究所谓“结式与行列式”的数学家。“在关氏死后300周年之际，作者发现了一些关于其家庭的重要记录和事实，特别是他的养父和他的第一份职业。现在可以写一个“关高和的简历。对关氏π的计算及其行列式也提出了新的看法。

Nishida Akinori, studied old mathematics of Seki's school, so-called "Wasan", in his youth, in the last period of the Edo Era, devoted his latter life to the national defense in the Meiji Era and left books of Wasan in the Library of Ochanomizu University. The author studied them and, life and bibliography of Seki Takakazu, a Japanese mathematician in the early period of the Edo era, who is known as the first in the world to study the so-called "resultants and determinants." On the occasion of the 300th posthumous anniversary of Seki, the author has found some significant records and facts concerning his family, especially his adoptive father and his first career. Now it is possible to write a "Curriculum Vitae of Seki Takakazu." The author also gave new viewpoints on Seki's calculation of π and the determinants.