On the dynamics of two exponential type systems of difference equations

In this paper we study the asymptotic behavior of the positive solutions of the systems of the two difference equations (i)xn+1=a+byn−1e−xn,yn+1=c+dxn−1e−yn,(ii)xn+1=a+byn−1e−yn,yn+1=c+dxn−1e−xn, where the constants a,b,c,da,b,c,d are positive real numbers, and the initial values x−1,x0,y−1,y0x−1,x0,y−1,y0 are also positive real numbers.