On 14/05/2013 15:36, email@example.com wrote: > On Tuesday, May 14, 2013 2:31:23 PM UTC+1, Robin wrote: <snip>...etc. > etc. etc,</snip> > > Thanks very much for taking the time to reply. > > The question comes from some work looking at generalising periodic > Horadam sequences to a ring context and whether there is any much > more interesting structure beyond just the ring you get by adjoining > a couple of primitive roots of unity to Z.
Another application of this sort of ring is Noga Alon's combinatorial Nulstellensatz: www.tau.ac.il/~nogaa/PDFS/null2.pdf? .