Title of article :
Steiner triple systems of order 19 and 21 with subsystems of order 7 Original Research Article
Author/Authors :
Petteri Kaski، نويسنده , , Patric R.J. ostergard، نويسنده , , Svetlana Topalova، نويسنده , , Rosen Zlatarski، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Steiner triple systems (STSs) with subsystems of order 7 are classified. For order 19, this classification is complete, but for order 21 it is restricted to Wilson-type systems, which contain three subsystems of order 7 on disjoint point sets. The classified STSs of order 21 are tested for resolvability; none of them is doubly resolvable.
Keywords :
classification , Doubly resolvable design , Subsystem , Steiner triple system
Journal title :
Discrete Mathematics
Journal title :
Discrete Mathematics
