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Grannell, M. J. and Knor, M.
(2014).
DOI: https://doi.org/10.1002/jcd.21357
Abstract
It was shown by Babai in 1980 that almost all Steiner triple systems are rigid; that is, their only automorphism is the identity permutation. Those Steiner triple systems with the largest automorphism groups are the projective systems of orders . In this paper we show that each such projective system may be transformed to a rigid Steiner triple system by at most
Pasch trades whenever
.