This material is based upon work supported by the National Science
Foundation (NSF) under Grant Nos. DMS-0812800, DMS-1115408, and DMS - 1419047.
Any opinions, findings and conclusions or recomendations expressed in this
material are those of the author(s) and do not necessarily reflect the views of
the NSF.
Preprints
● A. Hoffman, H.J. Hupkes, and E.S. Van Vleck,
``Multi-Dimensional Stability of Waves Traveling
through Rectangular Lattices in Rational Directions,''