Allgemeine Schnittzahlen in t-Designs. (General intersection numbers in t-designs)
The author examines the intersection numbers of t-designs and establishes a formula relating them. He uses his formula to show that a \(t- (v,k,\lambda)\) design does not exist whenever, for twin primes, p and \(p+2\) with \(p\geq 5,\) \(t=p-1,\) \(v=2p+1,\) \(k=p+3,\) \(\lambda =(1/6)(p+7).\)
scientific article; zbMATH DE number 4118382