Ym. Wang, MONOTONE ENCLOSURE FOR A CLASS OF DISCRETE BOUNDARY-VALUE-PROBLEMS WITHOUT MONOTONE NONLINEARITIES, Computers & mathematics with applications, 35(6), 1998, pp. 51-60
A new concept of a pair of upper and lower solutions is introduced for
a class of discrete boundary value problems without monotone nonlinea
rities. Some comparison results are established. An existence and encl
osing theorem for the solutions is given in terms of upper and lower s
olutions. A new monotone iterative scheme is proposed. The numerical e
xample is given.