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math.AT2018
Restrictions of aspherical arrangements
Nils Amend, Tilman Moeller, Gerhard Roehrle
In this note we present examples of -arrangements which admit a restriction which fails to be . This shows that asphericity is not hereditary among hyperplane arran…
math.AT2018
The topology of arrangements of ideal type
Nils Amend, Gerhard Roehrle
In 1962, Fadell and Neuwirth showed that the configuration space of the braid arrangement is aspherical. Having generalized this to many real reflection groups, Brieskorn conjectur…