Bent Functions on Finite Nonabelian Groups and Relative Difference Sets

IF 0.5 4区数学 Q3 MATHEMATICS

Journal of Combinatorial Designs Pub Date : 2025-01-16 DOI:10.1002/jcd.21970

Bangteng Xu

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引用次数: 0

Abstract

It is well known that the perfect nonlinearity of a function between finite groups $G$ and $H$ can be characterized by its graph in terms of relative difference set in the direct product $G \times H$ (cf. [4]). Let $T$ be the infinite set of complex roots of unity. A $T$ -valued function $f$ on an arbitrary finite group $G$ is associated with a finite cyclic subgroup $T_{f}$ in the multiplicative group of nonzero complex numbers. For a bent function $f$ on $G$ in general, its graph is not a relative difference set in the direct product $G \times T_{f}$ . In this paper, we investigate the necessary and sufficient conditions under which the graph of a bent function $f$ on $G$ is a relative difference set in $G \times T_{f}$ . Cyclotomic fields and their integral bases play an important role in our discussions.

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来源期刊

Journal of Combinatorial Designs 数学-数学

CiteScore

1.60

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Combinatorial Designs is an international journal devoted to the timely publication of the most influential papers in the area of combinatorial design theory. All topics in design theory, and in which design theory has important applications, are covered, including: block designs, t-designs, pairwise balanced designs and group divisible designs Latin squares, quasigroups, and related algebras computational methods in design theory construction methods applications in computer science, experimental design theory, and coding theory graph decompositions, factorizations, and design-theoretic techniques in graph theory and extremal combinatorics finite geometry and its relation with design theory. algebraic aspects of design theory. Researchers and scientists can depend on the Journal of Combinatorial Designs for the most recent developments in this rapidly growing field, and to provide a forum for both theoretical research and applications. All papers appearing in the Journal of Combinatorial Designs are carefully peer refereed.