Geodesic
On the Nonexistence of Orthogonal Steiner Systems of Order 9
Canadian mathematical bulletin, Tome 13 (1970) no. 1, pp. 131-134

Voir la notice de l'article provenant de la source Cambridge University Press

It is shown that no pair of orthogonal Steiner triple systems of order 9 exists. 
Mullin, R. C.; Nemeth, E. On the Nonexistence of Orthogonal Steiner Systems of Order 9. Canadian mathematical bulletin, Tome 13 (1970) no. 1, pp. 131-134. doi: 10.4153/CMB-1970-028-2
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[1] 1. Mullin, R. C. and Nemeth, E., On furnishing Room squares, Canad. Math. Bull. (4) 12 (1969), 493-497. Google Scholar

[2] 2. O'Shaughnessy, C. D., A Room design of order 14, Canad. Math. Bull. (2) 11, (1968), 191-194. Google Scholar

[3] 3. Stanton, R. G. and Horton, J. D., Composition of Room squares, (to appear). Google Scholar

[4] 4. Stanton, R. G. and Mullin, R. C., Construction of Room squares, Ann. Math. Stat. 39 (1968), 1540-48. Google Scholar

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