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

西田·阿基诺里在江户时代的最后一个时期，在江户时代的末期，学习了关学学派的旧数学，也就是所谓的《和三》，在明治时代将晚年献给了国防事业，并将和三的书籍留在了大和三大学的图书馆。作者研究了它们，以及江户时代早期日本数学家Seki Takakazu的生平和参考书目，Seki Takakazu被认为是世界上第一个研究所谓“结果式和行列式”的人。在世贵逝世300周年之际，作者发现了一些关于他的家庭，特别是他的养父和他的第一份职业的重要记录和事实。现在可以写一份“Seki Takakazu的履历”。作者还对Seki的π计算和行列式提出了新的看法。

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.