TY - JOUR ID - Idczak2016 LB - Idczak2016 AU - Idczak, Dariusz AU - Walczak, Stanislaw TI - On a linear-quadratic problem with Caputo derivative ST - On a linear-quadratic problem with Caputo derivative JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2016 VL - 36 IS - 1 SP - 49 EP - 68 DO - http://dx.doi.org/10.7494/OpMath.2016.36.1.49 UR - http://dx.doi.org/10.7494/OpMath.2016.36.1.49 AB - In this paper, we study a linear-quadratic optimal control problem with a fractional control system containing a Caputo derivative of unknown function. First, we derive the formulas for the differential and gradient of the cost functional under given constraints. Next, we prove an existence result and derive a maximum principle. Finally, we describe the gradient and projection of the gradient methods for the problem under consideration. KW - fractional Caputo derivative KW - linear-quadratic problem KW - existence and uniqueness of a solution KW - maximum principle KW - gradient method KW - projection of the gradient method SN - 1232-9274 ER -