Authors:
            
                    Antonio Agresti
                    
                        
                                1
                            
                    
                    ; 
                
                    Daniele Andreucci
                    
                        
                                2
                            
                    
                     and
                
                    Paola Loreti
                    
                        
                                2
                            
                    
                    
                
        
        
            Affiliations:
            
                    
                        
                                1
                            
                    
                    Mathematics Department, Sapienza University, Piazzale Aldo Moro, 5, 00185, Rome and Italy
                
                    ; 
                
                    
                        
                                2
                            
                    
                    SBAI Department, Sapienza University, Via Antonio Scarpa, 16, 00161, Rome and Italy
                
        
        
        
        
        
             Keyword(s):
            Exact Controllability, Wave Equation, Variable Control Subset, Multiplier.
        
        
            
                Related
                    Ontology
                    Subjects/Areas/Topics:
                
                        Evolutionary Computation and Control
                    ; 
                        Informatics in Control, Automation and Robotics
                    ; 
                        Intelligent Control Systems and Optimization
                    
            
        
        
            
                Abstract: 
                We study the controllability of the multidimensional wave equation in a bounded domain with Dirichlet boundary condition, in which the support of the control is allowed to change over time. The exact controllability is reduced to the proof of the observability inequality, which is proven by a multiplier method. Besides our main results, we present some applications.