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arxiv: 1607.07709 · v2 · pith:B4TCK3C7new · submitted 2016-07-26 · 🧮 math.AG · math.CO· math.DG· math.GT

Real line arrangements with Hirzebruch property

classification 🧮 math.AG math.COmath.DGmath.GT
keywords linearrangementshirzebrucharrangementmathbbpropertyrealanswer
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A line arrangement of $3n$ lines in $\mathbb CP^2$ satisfies Hirzebruch property if each line intersect others in $n+1$ points. Hirzebruch asked if all such arrangements are related to finite complex reflection groups. We give a positive answer to this question in the case when the line arrangement in $\mathbb CP^2$ is real, confirming that there exist exactly four such arrangements.

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