Author/Authors :
Patricia J. Y. Wong، نويسنده , , Ravi P. Agarwal، نويسنده ,
Abstract :
We develop criteria for the nonexistence of eventually positive negative.and
nondecreasing nonincreasing.solutions of the partial difference equation
=m=ny m,n.qP m,n, y mqk,nql..sQ m,n, y mqk,nql..
and
t
=m=ny m,n.q Pi m,n, y mqki,nqli..
is1
t
s Qi m,n, y mqki,nqli...
is1
Several examples which dwell upon the importance of our results are also included.