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arXiv 0910.1263math.NTmath.CO
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由模形式导出的三次分拆数的同余

Congruences for the Number of Cubic Partitions Derived from Modular Forms

William Y. C. Chen, Bernard L. S. Lin

摘要:

利用模形式得到了三次分拆数a(n)的同余式.三次分割的概念是由Chan介绍的,并由Kim与Ramanujan的三次连分数有关。Chan已经证明了a(n)有几个类似于划分数p(n)的性质,包括生成函数、连分数和同余关系。更具体地说,我们表明,$a(25n+22)\equiv 0 ({\rm mod} 5)$,$a(49n+15) \equiv a(49n+29) \equiv a(49n+36) \equiv a(49n+43) \equiv 0 ({\rm mod} 7)$。进一步证明了a(n)取无穷多个偶数值和无穷多个奇数值。

英文摘要:

We obtain congruences for the number a(n) of cubic partitions using modular forms. The notion of cubic partitions is introduced by Chan and named by Kim in connection with Ramanujan's cubic continued fractions. Chan has shown that a(n) has several analogous properties to the number p(n) of partitions, including the generating function, the continued fraction, and congruence relations. To be more specific, we show that $a(25n+22)\equiv 0 ({\rm mod} 5)$, $a(49n+15) \equiv a(49n+29) \equiv a(49n+36) \equiv a(49n+43) \equiv 0 ({\rm mod} 7)$. Furthermore, we prove that a(n) takes infinitely many even values and infinitely odd values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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