Existence of positive periodic solutions for difference equations with feedback control Original Research Article

We apply the continuation theorem of coincidence degree theory to study the existence of positive periodic solutions for the following difference equations with feedback control: View the MathML source{N(n+1)=N(n)exp⁡[r(n)(1−N(n−m)k(n)−c(n)μ(n))],Δμ(n)=−a(n)μ(n)+b(n)N(n−m), Turn MathJax on where a : ℤ → (0, 1), c, k, r, b : ℤ → ℝ+ are all ω-periodic functions and m is a positive integer.