一.引言中國數学史上现有很多懸案和爭論,例如勾股普遍定理最早的發現者为誰?“九章算術”的成書時代等等。但在1956年5月“數学通報”上又提了这样一个問題,即:圓周率3927/1250为誰所首創?其中錢宝琮教授認为是刘徽;而孫熾甫同志則主張是祖沖之,这兩种看法是不同的,在此以前也曾有过爭論,現在筆者也想就这問題發表一點管見,另外一个問題就是祖沖之的各种圓周率值是怎样求得的,尤其其中对於355/113一值的求得有兩种不同的主張:一是得自“調日法;一是得自連分數法,而筆者尚有第三种不成熟的看法,也在这裏介糾出來,請大家指教, 二.π≒3927/1250的作者 關於3927/1250的最早記載是在“九章算術”注中,而其注者最早的是刘徽,其後有祖沖之、甄鷟 I. INTRODUCTION In the history of Chinese mathematics, there are many unresolved cases and disputes, such as who is the earliest discoverer of the universal theorem of Pythagoreanism, the book era of “Nine Chapters of Arithmetic” and so on. However, in May 1956, the “Medical Bulletin” raised such a question: Who was Pioneer 3927/1250? The professor Qian Baojun thought it was Liu Hui; Comrade Sun Chih-chien claimed that he was Zu Chongzhi. These two views are different. There have been disputes before. Now I also want to express my opinion on this issue. Another question is how to calculate the pi values ​​of Zu Chongzhi, especially among them. There are two different claims for the value of 355/113: First, it is derived from the “Japanese-adjusted method”; first, it is derived from the score method, and the author still has a third immature view. It is also here. After the mediation, please enlighten. The earliest record of the author of π≒3927/1250 regarding 3927/1250 was in the “Nine Chapters of Arithmetic” note, and the earliest one was Liu Hui, followed by Zu Chongzhi. , 甄鷟