2010 Mathematics Subject Classification index        
        
    Volume 9, 2022
            
        Volume 9, Issue 4 (2022), pp. 503–506
            
    
                    Pub. online: 9 November 2022
                    
        Type: 2010 Mathematics Subject Classification Index
            
                
            
Open Access
        
            
    
                Published
9 November 2022
                    9 November 2022