Thomas Britz

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math.CO2024

Direct constructions of some group divisible designs with block size $4$ and up to $50$ points

R. Julian. R. Abel, Thomas Britz, Yudhistira A. Bunjamin +1

In this note, we give direct constructions of some group divisible designs (GDDs) with block size $4$ that have up to $50$ points.

math.CO2023

Group divisible designs with block size 4 and group sizes 4 and 7

R. Julian R. Abel, Thomas Britz, Yudhistira A. Bunjamin +1

In this paper, we consider the existence of group divisible designs (GDDs) with block size $4$ and group sizes $4$ and $7$ . We show that there exists a 4-GDD of type $4^{t} 7^{s}$ for…

Direct constructions of some group divisible designs with block size 4 and up to 50 points

Group divisible designs with block size 4 and group sizes 4 and 7

Direct constructions of some group divisible designs with block size $4$ and up to $50$ points