@ARTICLE{Safarova_Zumrud_R._On_2020, author={Safarova, Zumrud R.}, volume={vol. 30}, number={No 2}, journal={Archives of Control Sciences}, pages={199-212}, howpublished={online}, year={2020}, publisher={Committee of Automatic Control and Robotics PAS}, abstract={The paper is devoted to the finding of the coefficient of one nonlinear wave equation in the mixed problem. The considered problem is reduced to the optimal control problem with proper functional. Differentiability of functional is proved and the necessary optimality conditions are derived in the form of the variational inequality. Existence of the optimal control is proved.}, type={Article}, title={On a finding the coefficient of one nonlinear wave equation in the mixed problem}, URL={http://www.czasopisma.pan.pl/Content/116644/PDF/art01.pdf}, doi={10.24425/acs.2020.133497}, keywords={hyperbolic equation, nonlinear wave equation, optimal control problem, necessary condition}, }