SpringerIranian Journal of Science and Technology (Sciences)1028-627636320120611Optimal boundary control for infinite variables parabolic systems with time lags given in integral form277291207810.22099/ijsts.2012.2078ENG. M. BahaaDepartment of Mathematics, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi ArabiaM. M. TharwatDepartment of Mathematics, Faculty of Science, King Abdulaziz University, Jaddah, Saudi ArabiaJournal Article20111018In this paper, the optimal boundary control problem for distributed parabolic systems, involving second order<br />operator with an infinite number of variables, in which constant lags appear in the integral form both in the stateÂ equations and in the boundary condition is considered. Some specific properties of the optimal control are<br />discussed.http://ijsts.shirazu.ac.ir/article_2078_c313c744e68b9677adf4fbcfb376ef5a.pdf