Properties of the Steiner Triple Systems of Order 19
作者： Charles J. Colbourn , Anthony D. Forbes , Mike J. Grannell , Terry S. Griggs , Petteri Kaski
DOI: 10.37236/370
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摘要: Properties of the 11$\,$084$\,$874$\,$829 Steiner triple systems order 19 are examined. In particular, there is exactly one 5-sparse, but no 6-sparse, STS(19); uniform two STS(19) with almost parallel classes; all have chromatic number 3; index 10, except for 4$\,$075 designs 11 and 12; 3-resolvable; 3-existentially closed STS(19).
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