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We introduce the concept of a disjoint partial difference family (DPDF) and an external partial difference family (EPDF), a natural generalisation of the much-studied structures of disjoint difference family (DDF), external difference…

Combinatorics · Mathematics 2022-12-21 Sophie Huczynska , Laura Johnson

External difference families (EDFs) are combinatorial objects which were introduced in the early 2000s, motivated by information security applications such as the construction of AMD codes. Various generalizations have since been defined…

Combinatorics · Mathematics 2025-11-04 Sophie Huczynska , Christopher Jefferson , Struan McCartney

Skew partial difference sets (skew PDSs) are recently-introduced combinatorial objects closely related to partial difference sets (PDSs). To date, only one construction approach for non-trivial skew PDSs is known, using bent partitions:…

Combinatorics · Mathematics 2026-05-20 Sophie Huczynska , Tekgül Kalaycı

Classical strong external difference families (SEDFs) are much-studied combinatorial structures motivated by information security applications; it is conjectured that only one classical abelian SEDF exists with more than two sets. Recently,…

Combinatorics · Mathematics 2024-03-26 Sophie Huczynska , Sophie Hume

In this paper, six constructions of difference families are presented. These constructions make use of difference sets, almost difference sets and disjoint difference families, and give new point of views of relationships among these…

Information Theory · Computer Science 2014-11-14 Cunsheng Ding , Chik How Tan , Yin Tan

Strong external difference family (SEDF) and its generalizations GSEDF, BGSEDF in a finite abelian group $G$ are combinatorial designs raised by Paterson and Stinson [7] in 2016 and have applications in communication theory to construct…

Information Theory · Computer Science 2017-01-10 Jiejing Wen , Minghui Yang , Fangwei Fu , Keqin Feng

For nearly a century, mathematicians have been developing techniques for constructing abelian automorphism groups of combinatorial objects, and, conversely, constructing combinatorial objects from abelian groups. While abelian groups are a…

Combinatorics · Mathematics 2024-07-29 Eric Swartz , James A. Davis , John Polhill , Ken W. Smith

Recently, a construction of group divisible designs (GDDs) derived from the decoding of quadratic residue (QR) codes was given. In this paper, we extend the idea to obtain a new family of GDDs, which is also involved with a well-known…

Combinatorics · Mathematics 2018-09-05 Yu-pei Huang , Chia-an Liu , Yaotsu Chang , Chong-Dao Lee

(Strong) circular external difference families (which we denote as CEDFs and SCEDFs) can be used to construct nonmalleable threshold schemes. They are a variation of (strong) external difference families, which have been extensively studied…

Combinatorics · Mathematics 2023-10-30 Maura B. Paterson , Douglas R. Stinson

Frame difference families, which can be obtained via a careful use of cyclotomic conditions attached to strong difference families, play an important role in direct constructions for resolvable balanced incomplete block designs. We…

Combinatorics · Mathematics 2018-02-06 Simone Costa , Tao Feng , Xiaomiao Wang

Strong external difference families (SEDFs) are much-studied combinatorial objects motivated by an information security application. A well-known conjecture states that only one abelian SEDF with more than 2 sets exists. We show that if the…

Combinatorics · Mathematics 2023-05-30 Sophie Huczynska , Siaw-Lynn Ng

Circular external difference families (CEDFs) are a recently-introduced variation of external difference families with applications to non-malleable threshold schemes: a $(v,m,\ell,1)$-CEDF is an $m$-sequence $(A_0, \ldots, A_{m-1})$ of…

Combinatorics · Mathematics 2026-04-10 A. Burgess , F. Merola , T. Traetta

The circular external difference family and its strong version, which themselves are of independent combinatorial interest, were proposed as variants of the difference family to construct new unconditionally secure non-malleable threshold…

Combinatorics · Mathematics 2023-10-31 Huawei Wu , Jing Yang , Keqin Feng

In this paper, the first family of conforming finite element divdiv complexes on cuboid grids in three dimensions is constructed. Besides, a new family of conforming finite element divdiv complexes with enhanced smoothness on tetrahedral…

Numerical Analysis · Mathematics 2022-04-19 Jun Hu , Yizhou Liang , Rui Ma , Min Zhang

MDS codes have garnered significant attention due to their wide applications in practice. To date, most known MDS codes are equivalent to Reed-Solomon codes. The construction of non-Reed-Solomon (non-RS) type MDS codes has emerged as an…

Information Theory · Computer Science 2024-11-25 Lingfei Jin , Liming Ma , Chaoping Xing , Haiyan Zhou

Standard approaches to domain decomposition methods (DDM) are uncapable of producing block-diagonal system matrices. The derived-vector-space (DVS), approach to DDM, introduced in 2013, overcomes this limitation. However, the DVS approach…

Distributed, Parallel, and Cluster Computing · Computer Science 2021-09-20 Ismael Herrera Revilla

In the present paper, we study relative difference sets (RDSs) and linked systems of them. It is shown that a closed linked system of RDSs is always graded by a group. Based on this result, we also define a product of RDS linked systems…

Combinatorics · Mathematics 2023-12-14 Mikhail Muzychuk , Grigory Ryabov

Strong external difference families (SEDFs) have applications to cryptography and are rich combinatorial structures in their own right; until now, all SEDFs have been in abelian groups. In this paper, we consider SEDFs in both abelian and…

Combinatorics · Mathematics 2020-06-24 Sophie Huczynska , Christopher Jefferson , Silvia Nepsinska

In this paper we consider generalization of procedure of construction of potential systems for systems of partial differential equations with multidimensional spaces of conservation laws. More precisely, for construction of potential…

Mathematical Physics · Physics 2008-12-17 N. M. Ivanova

A new family of solutions of the Jacobi partial differential equations for finite-dimensional Poisson systems is investigated. This family is mathematically remarkable, as the functional dependences of the solutions appear to be associated…

Mathematical Physics · Physics 2019-10-22 Benito Hernández-Bermejo
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