Table of Contents

Combinatorics of Covers of Complexified Hyperplane Arrangements.- Homological Aspects of Hyperplane Arrangements.- Pencils of Plane Curves and Characteristic Varieties.- Lectures on Orlik-Solomon Algebras.- Local Systems and Constructible Sheaves.- Geometry and Combinatorics of Resonant Weights.- The Characteristic Quasi-Polynomials of the Arrangements of Root Systems and Mid-Hyperplane Arrangements.- Toric Varieties and the Diagonal Property.- to Plane Curve Singularities. Toric Resolution Tower and Puiseux Pairs.- Surface Singularities Appeared in the Hyperbolic Schwarz Map for the Hypergeometric Equation.- On the Extendability of Free Multiarrangements.- Problem Session.