3 papers
math.CO2025
Digraph-defined external difference families and new circular external difference families
Sophie Huczynska, Christopher Jefferson, Struan McCartney
External difference families (EDFs) are combinatorial objects which were introduced in the early 2000s, motivated by information security applications such as the construction of A…
cs.AI2025
Breaking the Symmetries of Indistinguishable Objects
Ozgur Akgun, Mun See Chang, Ian P. Gent +1
Indistinguishable objects often occur when modelling problems in constraint programming, as well as in other related paradigms. They occur when objects can be viewed as being drawn…
cs.DM2025
Composable Constraint Models for Permutation Enumeration
Ruth Hoffmann, Ãzgür Akgün, Christopher Jefferson
Constraint programming (CP) is a powerful tool for modeling mathematical concepts and objects and finding both solutions or counter examples. One of the major strengths of CP is th…