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              Abstract 
             
           
          
            
This paper is devoted to the proof of a conjecture of N. Moshchevitin related to the
 study of the approximation properties of badly approximable vectors. The proof uses
 the parametric geometry of numbers and relies on a fundamental theorem of
 D. Roy.
 
 
           
        
        
          
            
              Keywords 
              
                badly approximable vectors, simultaneous approximation
              
             
           
        
        
          
            
              Mathematical Subject Classification 
              
                Primary: 11H06, 11J13
              
             
           
        
        
          
            
              Milestones 
              
                Received: 26 November 2021
              
              
                Revised: 9 December 2021
              
              
                Accepted: 23 December 2021
              
              
                Published: 30 March 2022