Induced and Complete Multinets

Abstract

Multinets are certain configurations of lines and points with multiplicities in the complex projective plane ${\mathbb{P}}^2$. They appear in the study of resonance and characteristic varieties of complex hyperplane arrangement complements and cohomology of Milnor fibers. In this paper, two properties of multinets, inducibility and completeness, and the relationship between them are explored with several examples presented. Specializations of multinets plays an integral role in our findings. The main result is the classification of complete 3-nets.

16 pages, 2 figures. Corrected minor typos, added subsection 2.3, Theorem 4.5, and Problem 4