Characteristic polynomials, related to the normal form of the non linear Schrödinger equation
arXiv:1203.6015
Abstract
We study the irreducibility of the characteristic polynomial of the energy graph of the non linear Schrödinger equation (NLS). This will be useful to the verification of the second Melnikov condition for NLS.
arXiv admin note: text overlap with arXiv:1005.3838 by other authors