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math.CO2015
On the geometry of real or complex supersolvable line arrangements
Benjamin Anzis, Stefan Tohaneanu
Given a rank 3 real arrangement of lines in the projective plane, the Dirac-Motzkin conjecture (proved by Green and Tao in 2013) states that for sufficiently l…
math.CO2014★ 1 cited
Projective duality of arrangements with quadratic logarithmic vector fields
Stefan Tohaneanu
In these notes we study hyperplane arrangements having at least one logarithmic derivation of degree two that is not a combination of degree one logarithmic derivations. It is well…