16XX 


Associative rings and algebras {For the commutative case, see 13XX} 

16Nxx 

Radicals and radical properties of rings 


16N20 
Jacobson radical, quasimultiplication 


16N40 
Nil and nilpotent radicals, sets, ideals, rings 


16N60 
Prime and semiprime rings [See also 16D60, 16U10] 


16N80 
General radicals and rings {For radicals in module categories, see 16S90} 


16N99 
None of the above, but in this section 