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周髀算经一书,从唐以来便分为上下二卷(1)。该书所述内容约可分为三个时期:首纪周公和商高之问答,是为第一期;次纪荣方和陈子之问答,为第二期;至最后纂成此书,为第三期。余曾据若干例证,论定此书必成于西汉人之手,而去汉太初时当不甚远(2),兹不具述。本篇所欲介绍并希望加以讨论的,(一)陈子(?)出两个有关勾股定理的问题,(二)陈子毕竟是何时代的人。周公和商高之问答,不外说明勾三股四弦五的初步勾股术,并用此术测量高深广远的方法。周公后来为营成周,便用此法去测日景,以周髀名书,即原于此。又从商
Zhou Yi calculated a book, since the Tang was divided into two volumes (1). The contents of the book can be divided into three periods: the question and answer of the first period of the period of Zhou Gonghe and Shang Gao, which is the first period; the question and answer of the sub-period Rong Fang and Chen Zi, the second period; and the final period of the book, the third period. . According to some examples, Yu has argued that this book must become the hand of the West Han people, and it is not very far from the beginning of the Han Dynasty (2). This article wants to introduce and hopes to discuss, (a) Chen Zi (?) Two issues related to the Pythagorean theorem, (b) Chen Zi is after all people of any era. The question and answer of Zhou Gonghe and Shang Gao are nothing more than to describe the initial gouache of the three-stranded four-string five, and to use this technique to measure deep and wide methods. Zhou Gong later became a weekly camp and used this method to measure the day scene. Also from the business