Skip to main content
2 of 6
edited body
j.s.
  • 519
  • 2
  • 11

a block design question

Is it possible to show that every 1-design $D$ with $\lambda=4,k=4$ on $v$ points contain some 1-design $Q$ with $\lambda=1,k=4$ on $v$ points such that every block of $Q$ is some block of $D$ which one of its elements is removed?

j.s.
  • 519
  • 2
  • 11