Resonance varieties, admissible line combinatorics and combinatorial pencils

Details Resonance varieties, admissible line combinatorics and combinatorial pencils Resonance varieties, admissible line combinatorics and combinatorial pencils

2005-05-20

arxiv.org/abs/math/0505435v1

Mathematics

Combinatorics

13 pages, 2 figures

Scientific paper

In this paper we define the combinatorial analogous of a pencil, and show its relationship with the concept of admissibility. Such an object is usefull to study the isomorphisms between fundamental groups of the complements of line arrangement with the same combinatorial type. This definition generalizes the idea of net given by Yuzvinsky and others. The main theorem in this paper states that there is a correspondence between components of the resonance variety and combinatorial pencils.

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