1 | | In the construction of Stinson book the `BIBD(25,4,1)` comes from a difference family so we can just add it to the database. Moreover the function `PBD_4_5_8_9_12` previously failed for `v=4,5,7,8,9,12` where the trivial answer `[range(v)]` just fits. |
| 1 | In the construction of Stinson book the `BIBD(25,4,1)` comes from a difference family so we can just add it to the database. Moreover the function `PBD_4_5_8_9_12` previously failed for `v=4,5,8,9,12` where the trivial answer `[range(v)]` just fits. |