Tame arrangements

Abstract

Tame arrangements were informally introduced by Orlik and Terao for the study of Milnor fibers of hyperplane arrangements. After that, tame arrangements have been applied to a lot of researches on arrangements including freeness, master functions and critical varieties, Solomon-Terao algebras, D-modules, Bernstein-Sato polynomials and likelihood geometry. Though arrangements are generically tame, the research on tame arrangements themselves have been only few. In this article we establish foundations for the research of tame arrangements. Namely, we prove the addition theorem for tame arrangements, Ziegler-Yoshinaga type results for tameness and combinatorially determined tameness.