Additions and Corrections to

"Hyperplane Arrangements: An Introduction, Universitext, Springer Verlag, 2017"

The remarks below are added in view of readers' observations, for which I am always very grateful,
or they reflect my own new insights in this area of Mathematics. New results are also discussed,
if related to the open questions in the book. The references in brackets correspond to the references in the book.

  1. Singular codes to compute some of the invariants discussed in Chapter 8 are available here "Singular Codes".