Oscillation criteria for two-dimensional difference systems of first order linear difference equations

Sufficient conditions are established for the oscillation of the linear two-dimensional difference system Δxn=pnyn,Δxn=pnyn,Δyn−1=−qnxn,n∈N(n0)={n0,n0+1,…}, where {pn},{qn}{pn},{qn} are nonnegative real sequences. Our results extend the results in the literature.