TY - JOUR ID - Ishibashi2026 LB - Ishibashi2026 AU - Ishibashi, Kazuki TI - Wintner-type asymptotic behavior of linear differential systems with a proportional derivative controller ST - Wintner-type asymptotic behavior of linear differential systems with a proportional derivative controller JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2026 VL - 46 IS - 1 SP - 41 EP - 54 DO - https://doi.org/10.7494/OpMath.202512101 UR - https://doi.org/10.7494/OpMath.202512101 AB - This study investigated the asymptotic behavior of linear differential systems incorporating a proportional derivative-type (PD) differential operator. Building on the classical asymptotic convergence property of Wintner, a generalized Wintner-type asymptotic result was established for such systems. The proposed framework encompasses a wide class of time-varying coefficient matrices and extends classical asymptotic theory to equations governed by PD operators. An illustrative example is presented to demonstrate the applicability of the proposed theorem. KW - Wintner-type KW - asymptotic behavior KW - linear differential systems KW - proportional-derivative controller SN - 1232-9274 ER -