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PARTITIONS OF $\mathbb {Z}_m$ WITH IDENTICAL REPRESENTATION FUNCTION

Published online by Cambridge University Press:  22 September 2020

SHI-QIANG CHEN*
Affiliation:
School of Mathematical Sciences and Institute of Mathematics, Nanjing Normal University, Nanjing210023, P. R. China
XIAO-HUI YAN
Affiliation:
School of Mathematics and Statistics, Anhui Normal University, Wuhu210023, P. R. China e-mail: yanxiaohui_1992@163.com

Abstract

For a given set $S\subseteq \mathbb {Z}_m$ and $\overline {n}\in \mathbb {Z}_m$ , let $R_S(\overline {n})$ denote the number of solutions of the equation $\overline {n}=\overline {s}+\overline {s'}$ with ordered pairs $(\overline {s},\overline {s'})\in S^2$ . We determine the structure of $A,B\subseteq \mathbb {Z}_m$ with $|(A\cup B)\setminus (A\cap B)|=m-2$ such that $R_{A}(\overline {n})=R_{B}(\overline {n})$ for all $\overline {n}\in \mathbb {Z}_m$ , where m is an even integer.

Type
Research Article
Copyright
© 2020 Australian Mathematical Publishing Association Inc.

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Footnotes

This work was supported by the National Natural Science Foundation of China, Grant No. 11771211. The first author is also supported by the Project of Graduate Education Innovation of Jiangsu Province, Grant No. KYCX20_1167.

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