L. Jodar et al., 2ND-ORDER DIFFERENCE-SYSTEMS IN UNBOUNDED-DOMAINS - EXISTENCE CONDITIONS AND CONSTRUCTION OF EXACT AND APPROXIMATE BOUNDED SOLUTIONS, Applied mathematics and computation, 71(2-3), 1995, pp. 271-287
In this paper existence conditions and explicit expressions of bounded
solutions for nonhomogeneous second-order difference systems defined
in unbounded domains are given. Bounded solutions are expressed in ter
ms of series involving a bounded fundamental matrix solution. Computab
le approximate solutions are constructed and error bounds in terms of
the data are given.