Stability of Schur's iterates and fast solution of the discrete integrable NLS

Autor: Bessonov, R. V., Gubkin, P. V.
Rok vydání: 2024
Předmět:
Druh dokumentu: Working Paper
Popis: We prove a sharp stability estimate for Schur iterates of contractive analytic functions in the open unit disk. We then apply this result in the setting of the inverse scattering approach and obtain a fast algorithm for solving the discrete integrable nonlinear Schr\"odinger equation (Ablowitz-Ladik equation) on the integer lattice, $\mathbb{Z}$. We also give a self-contained introduction to the theory of the nonlinear Fourier transform from the perspective of Schur functions and orthogonal polynomials on the unit circle.
Databáze: arXiv