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math.AC2008
Totally free arrangements of hyperplanes
Takuro Abe, Hiroaki Terao, Masahiko Yoshinaga
A central arrangement $\A$ of hyperplanes in an -dimensional vector space is said to be {\it totally free} if a multiarrangement $(\A, m)$ is free for any multiplicity $…
math.AC2006
The characteristic polynomial of a multiarrangement
Takuro Abe, Hiroaki Terao, Max Wakefield
Given a multiarrangement of hyperplanes we define a series by sums of the Hilbert series of the derivation modules of the multiarrangement. This series turns out to be a polynomial…