2 papers
math.CO2025
-additive Steiner 2-designs
Marco Buratti, Mario Galici, Alessandro Montinaro +2
A design is -additive with an abelian group, if its points are in and each block is zero-sum in . All the few known ``manageable" additive Steiner 2-designs are $\mat…
math.CO2023
Banff designs: difference methods for coloring incidence graphs
Marco Buratti, Francesca Merola, Anamari Nakic +1
We present some results on the harmonious colorings of the Levi graph of a -design, focusing on Steiner -designs. It is easily seen that the harmonious chromatic number of su…