Skip to main content
added 5 characters in body
Source Link
Peter Dukes
  • 1.1k
  • 1
  • 8
  • 17

Yuichiro's is the best answer, but here's another "cheat" answer (which I nonetheless think is kind of neat):

Take a PBD$(v,\{3,5\})$, triple each block of size three, and replace each block of size five by the complete design on 5 points$\binom{[5]}{3}$. Various PBD$(v,\{3,5\})$ can be found by cyclotomy.

Yuichiro's is the best answer, but here's another "cheat" answer (which I nonetheless think is kind of neat):

Take a PBD$(v,\{3,5\})$, triple each block of size three, and replace each block of size five by the complete design on 5 points. Various PBD$(v,\{3,5\})$ can be found by cyclotomy.

Yuichiro's is the best answer, but here's another "cheat" answer (which I nonetheless think is kind of neat):

Take a PBD$(v,\{3,5\})$, triple each block of size three, and replace each block of size five by the complete design $\binom{[5]}{3}$. Various PBD$(v,\{3,5\})$ can be found by cyclotomy.

Source Link
Peter Dukes
  • 1.1k
  • 1
  • 8
  • 17

Yuichiro's is the best answer, but here's another "cheat" answer (which I nonetheless think is kind of neat):

Take a PBD$(v,\{3,5\})$, triple each block of size three, and replace each block of size five by the complete design on 5 points. Various PBD$(v,\{3,5\})$ can be found by cyclotomy.