- 
                            
                            
                                                            
                            
                                                                    16-00                                                            
                            General reference works (handbooks, dictionaries, bibliographies, etc.)
                         
                                                - 
                            
                            
                                                            
                            
                                                                    16-01                                                            
                            Instructional exposition (textbooks, tutorial papers, etc.)
                         
                                                - 
                            
                            
                                                            
                            
                                                                    16-02                                                            
                            Research exposition (monographs, survey articles)
                         
                                                - 
                            
                            
                                                            
                            
                                                                    16-03                                                            
                            Historical (must also be assigned at least one classification number from Section 01)
                         
                                                - 
                            
                                                            
                            
                                                            
                            
                                                                    16-04                                                            
                            Explicit machine computation and programs (not the theory of computation or programming)
                         
                                                - 
                            
                            
                                                            
                            
                                                                    16-06                                                            
                            Proceedings, conferences, collections, etc.
                         
                                                - 
                            
                            
                                                            
                            
                                                                    16-99                                                            
                            None of the above but in this section
                         
                                                - 
                            
                                                            
                            
                                                                    (+2)
                                                            
                            
                            General and miscellaneous
                         
                                                - 
                            
                            
                                                                    (+14)
                                                            
                            
                            Modules, bimodules and ideals
                         
                                                - 
                            
                            
                                                                    (+22)
                                                            
                            
                            Homological methods 
{For commutative rings, see  
13Dxx; for general categories, see  
18Gxx}
 
                         
                                                - 
                            
                            
                                                                    (+26)
                                                            
                            
                            Representation theory of rings and algebras
                         
                                                - 
                            
                            
                                                                    (+4)
                                                            
                            
                            Algebras and orders 
{For arithmetic aspects, see  
11R52,  
11R54,  
11S45; for representation theory, see  
16G30}
 
                         
                                                - 
                            
                            
                                                                    (+10)
                                                            
                            
                            Division rings and semisimple Artin rings 
[See also  
12E15,  
15A30]
 
                         
                                                - 
                            
                            
                                                                    (+2)
                                                            
                            
                            Local rings and generalizations
                         
                                                - 
                            
                            
                                                                    (+4)
                                                            
                            
                            Radicals and radical properties of rings
                         
                                                - 
                            
                            
                                                                    (+16)
                                                            
                            
                            Chain conditions, growth conditions, and other forms of finiteness
                         
                                                - 
                            
                            
                                                                    (+2)
                                                            
                            
                            Rings with polynomial identity
                         
                                                - 
                            
                            
                                                                    (+47)
                                                            
                            
                            Rings and algebras arising under various constructions
                         
                                                - 
                            
                            
                                                                    (+24)
                                                            
                            
                            Hopf algebras, quantum groups and related topics
                         
                                                - 
                            
                            
                                                                    (+6)
                                                            
                            
                            Conditions on elements
                         
                                                - 
                            
                            
                                                                    (+23)
                                                            
                            
                            Rings and algebras with additional structure
                         
                                                - 
                            
                            
                                                                    (+14)
                                                            
                            
                            Generalizations 
{For nonassociative rings, see  
17-XX}
 
                         
                                                - 
                            
                                                            
                            
                                                                    (+4)
                                                            
                            
                            Computational aspects of associative rings