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关于过剩数的Kravitz猜想
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作者 陈锡庚 黄寿生 《湛江师范学院学报》 2006年第3期7-8,共2页
设n是正整数,σ(n)是n的约数和函数,证明了:如果n满足σ(n)=2n+k2,其中k是与n互素的正奇数,则n必为奇平方数,而且n必有适合p=1(mod 4)的奇素因数p.
关键词 过剩数 拟完全数 kravitz猜想
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From Nobody to Somebody ——A Comparison between Jay Gatsbyand Duddy Kravitz
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作者 张鳌 《西昌师专学报》 1996年第4期83-86,共4页
After a series of comparison between Jay Gatsby——the protagonist of "The Great Gatsby"and Duddy kravitz——the protagonist of "The Apprenticeship of Duddy kravitz",the authorof this essay gets su... After a series of comparison between Jay Gatsby——the protagonist of "The Great Gatsby"and Duddy kravitz——the protagonist of "The Apprenticeship of Duddy kravitz",the authorof this essay gets such a conclusion,that Jay Gatsby was a pure idealist,while Duddykravitz a vulgar materialist. 展开更多
关键词 From Nobody to Somebody A Comparison between Jay Gatsbyand Duddy kravitz
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