13XX 


Commutative rings and algebras 

13Cxx 

Theory of modules and ideals 


13C05 
Structure, classification theorems 


13C10 
Projective and free modules and ideals [See also 19A13] 


13C11 
Injective and flat modules and ideals 


13C12 
Torsion modules and ideals 


13C13 
Other special types 


13C14 
CohenMacaulay modules [See also 13H10] 


13C15 
Dimension theory, depth, related rings (catenary, etc.) 


13C20 
Class groups [See also 11R29] 


13C40 
Linkage, complete intersections and determinantal ideals [See also 14M06, 14M10, 14M12] 


13C99 
None of the above, but in this section 