A generalization of the Doyen-Wilson theorem for extended triple systems of all indices
The following theorem is proved: An extended triple system of order \(n\) and index \(\lambda\) can be embedded in an extended triple system of order \(v\) and index \(\lambda\) if and only if \(v= n\) or \(v\geq 2n\).
scientific article; zbMATH DE number 1334529