Computational methods and algorithms. Part 4
      
      
        
      
      
  
    
    
    On the evaluation of truncation error of the projection methods in the problem of best approximation
    
    
  
  
  
        
          
        
      
 
      
        p. 5-18
        
        
        
        
      
    
  
        p. 19-26
        
        
        
        
      
    
  
        p. 42-60
        
        
        
        
      
    
  
        p. 102-110
        
        
        
        
      
    
  
        p. 123-137
        
        
        
        
      
    
  
        p. 147-155