  Varchenko's approach to quantum groups, from the theory of arrangements of
hyperplanes, can be usefully applied to q-algebras in general, of which quantum
groups and quantum (super) Kac-Moody algebras are special cases. New results
are obtained on the classification of q-algebras, and of the Serre ideals of
generalized quantum (super) Kac-Moody algebras.
