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Anti-Pasch Steiner triple systems. (English) Zbl 0741.05009
Summary: It is proved that there exists an anti-Pasch (or quadrilateral free) Steiner triple system on $$v$$ points for all $$v\equiv 3$$ (mod 6).

##### MSC:
 05B07 Triple systems
##### Keywords:
anti-Pasch Steiner triple systems