# Construction techniques for anti-Pasch Steiner triple systems

Ling, A. C. H.; Colbourn, C. J.; Grannell, M. J. and Griggs, T. S. (2000). Construction techniques for anti-Pasch Steiner triple systems. Journal of the London Mathematical Society, 61(3) p. 641.

## Abstract

Four methods for constructing anti-Pasch Steiner triple systems are developed. The first generalises a construction of Stinson and Wei to obtain a general singular direct product construction. The second generalises the Bose construction. The third employs a construction due to Lu. The fourth employs Wilson-type inflation techniques using Latin squares having no subsquares of order two. As a consequence of these constructions we are able to produce anti-Pasch systems of order for or (mod 18), for (mod 72), and for many other values of .