This paper deals with optimal control problems of semilinear parabolic equations with pointwise state constraints and coupled integral state-control constraints. We obtain necessary optimality conditions in the form of a Pontryagin's minimum principle for local solutions in the sense of Lp, p +. Key words. optimal control, nonlinear boundary controls, semilinear parabolic equations, state constraints, Pontryagin's minimum principle, unbounded controls AMS subject classifications. 49K20, 35K20 PII. S0363012998345627
E. Casas, J. P. Raymond, H. Zidani