Linear differential equations with periodic coefficients constitute a well developed part of the theory of ordinary differential equations 17, 94, 156, 177, 178, 272, 389]. They arise in many physical and technical applications 177, 178, 272]. A new wave of interest in this subject has been stimulated during the last two decades by the development of the inverse scattering method for integration of nonlinear differential equations. This has led to significant progress in this traditional area 27, 71, 72, 111- 119, 250, 276, 277, 284, 286, 287, 312, 313, 337, 349, 354, 392, 393, 403, 404]....
Linear differential equations with periodic coefficients constitute a well developed part of the theory of ordinary differential equations 17, 94, 15...
