arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1102.3236math.NT
收藏

关于广义乘法表中的整数个数

On the number of integers in a generalized multiplication table

Dimitris Koukoulopoulos

摘要:

受Erdos乘法表问题的启发,我们研究了如下问题:给定数N_1,...,N_{k+1},有多少不同的产品的形式n_1. n_i<N_i的n_{k+1}对所有i都有吗?调用A_{k+1}(N_1,.,N_{k+1})相关数量。Ford建立了A_2(N_1,N_2)的数量级和A_{k+1}(N,.,N),对于所有k>1。本文通过建立A_{k+1}(N_1,.,N_{k+1})对于N_1,.,当k为2、3、4或5时,计算N_{k+1}。此外,当k>5时,我们得到了问题的部分答案。最后,我们开发了一个启发式的参数,解释了为什么我们的方法的限制是k=5一般,我们建议的方法,提高本文的结果。

英文摘要:

Motivated by the Erdos multiplication table problem we study the following question: Given numbers N_1,...,N_{k+1}, how many distinct products of the form n_1...n_{k+1} with n_i<N_i for all i are there? Call A_{k+1}(N_1,...,N_{k+1}) the quantity in question. Ford established the order of magnitude of A_2(N_1,N_2) and the author of A_{k+1}(N,...,N) for all k>1. In the present paper we generalize these results by establishing the order of magnitude of A_{k+1}(N_1,...,N_{k+1}) for arbitrary choices of N_1,...,N_{k+1} when k is 2,3,4 or 5. Moreover, we obtain a partial answer to our question when k>5. Lastly, we develop a heuristic argument which explains why the limitation of our method is k=5 in general and we suggest ways of improving the results of this paper.

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。

↑