On the topology of arrangements of a cubic and its inflectional tangents
  A $k$-Artal arrangement is a reducible algebraic curve composed of a smooth cubic and $k$ inflectional tangents. By studying the topological properties of their subarrangements, we prove that for $k=3,4,5,6$, there exist Zariski pairs of $k$-Artal arrangements. These Zariki pairs can be distinguished in a geometric way by the number of collinear triples in the set of singular points contained in the cubic. 
Shinzo Bannai, Beno\^it Guerville-Ball\'e, Taketo Shirane, Hiro-o   Tokunaga
math.AG math.GT