给出幻映射、幻群及幻方与幻方同构的概念,把许多组合数学对象,如拉丁方、欧拉方及各种类型的幻方等等均纳入到幻映射这个统一的框......

【正】 Oscar Fingall O’Flahertie Wills Wilde, normally abbreviated to Oscar Wilde, which is more popular and familiar t......