RT Journal Article ID 7f2e955e43459546 A1 Ismayilova , Gyunay Gafil kyzy T1 On Determination of the Coefficient of the Lower Term of the Multidimensional Hyperbolic Equation of the Second Order JF Journal of Automation and Information Sciences JO JAI(S) YR 2019 FD 2019-05-03 VO 51 IS 1 SP 78 OP 85 K1 hyperbolic equation K1 coefficient of the lower term K1 inverse problem K1 optimal control AB Determination of the coefficient of the lower term of the multidimensional hyperbolic equation of the second order with the integral overdetermination condition is reduced to a problem of optimal control and the obtained problem is studied by methods of the theory of optimal control. A theorem about the existence of the optimal control is proved, continuous Frechet differentiability of the functional is ascertained and by means of solving the conjugate problem the necessary condition of optimality is derived. PB Begell House LK https://www.dl.begellhouse.com/journals/2b6239406278e43e,3a51e96f24729a75,7f2e955e43459546.html