竞赛问题:正整数的关联Murray数

你听到过正整数的关联Murray数吗?其实是一个蛮有趣的问题,基础在于完全平方数的简单推理–简单归简单,可是要严密哦!今年的CIMC(加拿大中级数学竞赛 – 9,10年级组)就出了这样的问题。
本题易于理解,但是要深入下去,对数学底子有点要求。我们讲述时力求启发性,雅俗共赏。

Read More... 阅读全文 .. ..

58th IMO (International Math Olympiad): leaders meet at Brazil

As the most prestigious math competition event, the International Mathematics Olympiad – this year is the 58th – will be held at Rio de Janeiro, Brazil, right in this month – July 2017. The hosting committee has sent a warm welcome to all. Here is the message from the organizer’s : Rio de Janeiro will […]

Read More... 阅读全文 .. ..