Existence and estimate of solutions of some nonlinear Volterra difference equations in Hilbert spaces
Sufficient conditions for the existence of bounded solutions for Volterra difference equations \[ x_n- f_n= -\sum^n_{k=0} a_{n-k} G_k(x_k) \] are obtained where \(\langle x- c_n, G_n(x)\rangle\geq 0\;\forall x\in X\).
scientific article; zbMATH DE number 2159773