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Constructing orthogonal designs in powers of two via symbolic computation and rewriting techniques

  • Ilias Kotsireas
  • Temur Kutsia
  • Dimitris E. SimosEmail author
Article
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Abstract

In the past few decades, design theory has grown to encompass a wide variety of research directions. It comes as no surprise that applications in coding theory and communications continue to arise, and also that designs have found applications in new areas. Computer science has provided a new source of applications of designs, and simultaneously a field of new and challenging problems in design theory. In this paper, we revisit a construction for orthogonal designs using the multiplication tables of Cayley-Dixon algebras of dimension 2n. The desired orthogonal designs can be described by a system of equations with the aid of a Gröbner basis computation. For orders greater than 16 the combinatorial explosion of the problem gives rise to equations that are unfeasible to be handled by traditional search algorithms. However, the structural properties of the designs make this problem possible to be tackled in terms of rewriting techniques, by equational unification. We establish connections between central concepts of design theory and equational unification where equivalence operations of designs point to the computation of a minimal complete set of unifiers. These connections make viable the computation of some types of orthogonal designs that have not been found before with the aforementioned algebraic modeling.

Keywords

Orthogonal designs Unification theory Algorithms Gröbner bases 

Mathematics Subject Classification (2010)

05B20 68W30 

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Notes

Acknowledgements

The first author is supported by an NSERC Discovery grant. The second author has been supported by the Austrian Science Fund (FWF) under the projects SToUT (P 24087-N18) and GALA (P 28789-N32). The third author has been funded in part by the Austrian COMET Program from the Austrian Research Promotion Agency (FFG). Moreover, the authors are thankful to the anonymous reviewers for their helpful suggestions and comments that improved the presentation of the paper.

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Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Wilfrid Laurier UniversityWaterlooCanada
  2. 2.RISCJohannes Kepler UniversityLinzAustria
  3. 3.SBA ResearchViennaAustria

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