We announce the end of the classification of all firm and residually connected geometries satisfying the conditions (IP)_2 and (2T)_1 and on which the Higman-Sims group HS acts flag-transitively and residually weakly primitively.
The complete list of geometries is available as a supplement to this paper.
Download a PostScript or a DVI version of the supplement.
Download the geometries of HS as a gzipped tarred magma file.
Download the paper. I acknowledge the Australasian Journal of Combinatorics for giving me the permission to make the reprint of this paper available freely on my website.
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