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math.GT2002★ 2 cited
Chromatic properties of generic planar configurations of points
Roland Bacher, David Garber
We study the Orchard relation for generic configurations of points in the plane (also called order types). We introduce infinitesimally-close points and analyse the relation of thi…
math.GT2002★ 2 cited
Spindle configurations of skew lines
Roland Bacher, David Garber
We prove a conjecture of Crapo and Penne which characterizes isotopy classes of skew configurations with spindle-structure. We use this result in order to define an invariant, spin…