Geodesic
The combinatorial (19_4) configurations
Ars Mathematica Contemporanea, Tome 5 (2012) no. 2, pp. 235-241.

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A parallel backtrack search is carried out to classify, up to isomorphism, all combinatorial (194) configurations. A total of 269 224 652 such configurations were found. We prove that two of the combinatorial (194) configurations are not geometrically realizable over any field. Also we confirmed the computation of the 971 171 combinatorial (184) configurations which lacked an independent verification.
DOI : 10.26493/1855-3974.216.59d
Keywords: (19_4)-configurations, Symmetric Designs, Finite Geometries, NMDS-Code, Paralell Backtracking search with isomorph rejection. 
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Octavio Páez Osuna; Rodolfo San Agustín Chi. The combinatorial (19_4) configurations. Ars Mathematica Contemporanea, Tome 5 (2012) no. 2, pp. 235-241. doi : 10.26493/1855-3974.216.59d. http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.216.59d/

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