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1782年以来一直是一个謎的“尤拉猜想”,即尤拉关于不存在(4m+2)阶尤拉方陣的猜想,終于在1959年春天被否定地解决了。第一个提出反例的是印度数學家玻色和史里克汉德。他們首先举出22阶尤拉方阵,从而推翻了尤拉猜想。接着美国数学家派克又举出10阶尤拉方陣,随后在很短的日子里,除了2阶和6阶以外,所有的情形都为他們所解决。在此之前,美国人曾經利用由于对Mersenne数的素数检定而聞名的电子計算机SWAG,对10阶尤拉方陣进行了探索,但是得不到任何訊息。正在这个时候,玻色等人得到了惊人的結果。許多国家的报刊和通俗科学杂志都报道了这个消息。下面只就尤拉方陣的来由和經过,作一些很簡短的介紹。
The Yura Conjecture, which has been a mystery since 1782, is Yura’s conjecture that there is no (4m+2) Euler’s square and was finally negated in the spring of 1959. The first counter-example was the Indian mathematician Bose and Strickhand. They first cited the 22th Eurasian matrix and thus overthrew the Euler conjecture. Then the American mathematician Peck gave another 10th-ranking Euler’s square. Then in a very short period of time, all but the 2nd and 6th orders were resolved for them. Prior to this, the Americans used electronic computer SWAG, which is famous for the prime number test of Mersenne, to explore the 10th Euler Array, but there was no news. At this time, Bose and others got amazing results. Newspapers and popular science magazines in many countries have reported this news. The following is only a brief introduction to the origin and passing of the Yura square.