Title : 
Comments on "Strengthened 
  
 -Infinity Control via State Feedback: A Majorization Approach Using Algebraic Riccati Inequalities
 
        
            Author : 
Mingfang Ding ; Yueliang Xu
         
        
            Author_Institution : 
Dept. of Math., Southwest Jiaotong Univ., Chengdu
         
        
        
        
        
        
        
            Abstract : 
"For original paper see Y. K. Foo, ibid., vol.49, no 5, p-824-27, (2004)". Theorem 3.3 of the above paper contains some errors, which are discussed in this note. Consequently the necessary corrections are presented.
         
        
            Keywords : 
Hinfin control; Riccati equations; stability; state feedback; transfer function matrices; algebraic Riccati inequality; internal stabilization; majorization approach; positive semidefinite matrix; state feedback; strengthened H-infinity control; transfer function matrix; Constraint theory; Control systems; Eigenvalues and eigenfunctions; Riccati equations; Transfer functions; $H_{infty}$  norm; Algebraic Riccati equation; internal stabilization; positive semidefinite matrix; transfer function matrix;
         
        
        
            Journal_Title : 
Automatic Control, IEEE Transactions on
         
        
        
        
        
            DOI : 
10.1109/TAC.2008.2007876