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Koszulness and supersolvability for Dirichlet arrangements. (arXiv:1810.03518v1 [math.CO])
来源于:arXiv
We prove that the cone over a Dirichlet arrangement is supersolvable if and
only if its Orlik-Solomon algebra is Koszul. This was previously shown for four
other classes of arrangements. We exhibit an infinite family of cones over
Dirichlet arrangements that are combinatorially distinct from these other four
classes. 查看全文>>
