Approximation of solution of linear differential equation with almost period function coefficients (Q5957119)

Here, the authors consider the approximation of the solution for the linear differential equation \[ {dy_i\over dt}= \sum^m_{j=1} a_{ij}(t) y_j+ w_j(t),\quad i= 1,\dots, m, \] where \(a_{ij}(t)\), \(w_j(t)\) are real almost-periodic functions. The inequality of Bellman and results of G. P. Li and H. T. Cai are used in that paper.