Multiplicativity of the $\mathcal{I}$-invariant and topology of glued arrangements

Benoît Guerville-Ballé

The invariant $\mathcal{I}(\mathcal{A},\xi ,\gamma )$ was first introduced by E. Artal, V. Florens and the author. Inspired by the idea of G. Rybnikov, we obtain a multiplicativity theorem…