2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75130This is a slightly revised version (with references added in) of a survey article which appeared in the Spring 2005 edition of the MSRI newsletter, the Emissary. The article describes some of the themes from the Fall 2004 MSRI program on Hyperplane Arrangements and Applications.6 pagesAlgebraic GeometryCombinatoricsGroup Theory52C35; 14M12, 14N20, 16E05, 16S37, 20F14, 55P62text