Tactical decompositions of Steiner systems and orbits of projective groups
The author strengthens the upper bound in Block's lemma for the case of 2-designs with \(\lambda= 1\). He then applies his results to \(\text{PG}(n,g)\). It is unfortunate that the definition given for a Steiner system is incorrect. While 2-designs with \(\lambda= 1\) are certainly Steiner systems, the converse is not true. Fortunately, the incorrect nomenclature does not affect the results.
scientific article; zbMATH DE number 1553312