Spectral Meromorphic Operators and Nonlinear Systems

P. G. Grinevich, S. Novikov

We study here class of 1D spectral-meromorphic (s-meromorphic) OD operators $L={\partial }_x^n+{\sum }_{n-2\ge i\ge 0}{a}_{n-2-i}{\partial }_x^i$ with meromorphic coefficients $a_j$ near $x…