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math.CO2009

Groupes d'isométries permutant doublement transitivement un ensemble de droites vectorielles

Lucas Vienne

Let X be a non-empty finite set, E be a finite dimensional euclidean vector space and G a finite subgroup of O(E), the orthognal group of E. Suppose GG={U_i | i in X} is a finite s…

math.CO2009

Représentations linéaires des graphes finis

Lucas Vienne

Let X be a non-empty finite set and alpha a symmetric bilinear form on a real finite dimensional vector space E. We say that a set GG={U_i | i in X} of linear lines in E is an isom…