Maximal partial spreads in PG(3,4) and maximal sets of mutually orthogonal Latin squares of order 16

  • Authors:
  • Dieter Jungnickel;Leo Storme

  • Affiliations:
  • Lehrstuhl für Diskrete Mathematik, Optimierung und Operations Research, Universität Augsburg, D-86135 Augsburg, Germany;Department of Pure Maths and Computer Algebra, Ghent University, Krijgslaan 281, B-9000 Gent, Belgium

  • Venue:
  • Discrete Mathematics - Papers on the occasion of the 65th birthday of Alex Rosa
  • Year:
  • 2003

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Abstract

The maximal partial spreads of PG(3,4) were recently classified by Leonard Soicher. Each such partial spread (with r lines, say) yields a translation net of order 16 and degree r and hence a set of r-2 mutually orthogonal Latin squares of order 16. We determine which of these nets are transversal-free. In particular, we obtain sets of t MAXMOLS(16) for two previously unknown cases, namely for t = 9 and 10.