Linear free divisors are free divisors, in the sense of K.Saito, with linear
presentation matrix (example: normal crossing divisors). Using techniques of
deformation theory on representations of quivers, we exhibit families of linear
free divisors as discriminants in representation spaces for real Schur roots of
a finite quiver. We review some basic material on quiver representations, and
explain in detail how to verify whether the discriminant is a free divisor and
how to determine its components and their equations, using techniques of A.
Schofield. As an illustration, the linear free divisors that arise as the
discriminant from the highest roots of Dynkin quivers of type E7 and E8 are
treated explicitly.Comment: 27 pages; to appear in Singularities and Computer Algebra, papers in
honour of G.-M.Greuel's 60th birthda
