Abstract
For each simplicial arrangement in the real projective plane of the catalogue of Grunbaum, we determine the minimal extension of the rationals over which there exists a realization of its incidence structure. For the infinite families we use the symmetries of the incidence. For the sporadic arrangements we give an algorithm that uses Grobner bases.
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More From: Innovations in Incidence Geometry: Algebraic, Topological and Combinatorial
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