Volker Leck
The Index-\lambda-Closures of the Subsets of {3,...,10} Including 3
Preprint series: Preprints aus dem Fachbereich Mathematik, Universität Rostock
05B30 Other designs, configurations, See also {51E30}
Abstract: Gronau, Mullin and Pietsch determined the exact closure of index one
of all subsets K of {3,...,10} which include 3. We extend their results
to obtain the exact closure of such K for all indices.
Keywords: closure, PBD, design