首先,我从网上看到的两个报导说起。一则是前不久,苏州中学举行中国科大少年预备班的招生考试时,试卷中出了这样一题:古今中外,许多人致力于研究与计算。为了计算出越来越好的近似值,一代代的数学家为这个神秘的 First of all, the two reports I saw on the Internet started. One is that not long ago when Suzhou Middle School held the entrance examination for the preparatory class of China National University Junior High School, a question was raised in the examination paper: many people devoted themselves to research and calculations in ancient and modern times. In order to calculate better and better approximations, generations of mathematicians are this mysterious