Abstract: | We introduce a class of infinite matrices
(Ass¢, s, s¢ ? \mathbbZd){(A_{ss\prime}, s, s\prime \in \mathbb{Z}^d)} , which are asymptotically (as |s| + |s′| → ∞) close to Hankel–T?plitz matrices. We prove that this class forms an algebra, and that flow-maps of nonautonomous linear
equations with coefficients from the class also belong to it. |