A Relation between the Weyl Group W(e8) and Eight-Line Arrangements on a Real Projective Plane

Fukui, Tetsuo; Sekiguchi, Jiro

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We show that the diffeomorphic type of the complement to a line arrangement in a complex projective plane P 2 depends only on the graph of line intersections if no line in the arrangement contains more than two points in which at least two lines intersect. This result also holds for some special arrangements which do not satisfy this property. However it is not true in general, see [Rybnikov G., On the fundamental group of the complement of a complex hyperplane arrangement, Funct. Anal....