Flag-transitive 2- $$(v,k,lambda )$$ ( v,k , λ ) designs with $$r>lambda (k-3)$$ r > λ ( k - 3 )

Designs, Codes and Cryptography - In this paper, we study the flag-transitive automorphism groups of 2-designs and prove that if G is a flag-transitive automorphism group of a 2-design $$mathcal...