12XX 


Field theory and polynomials 

12Dxx 

Real and complex fields 


12D05 
Polynomials: factorization 


12D10 
Polynomials: location of zeros (algebraic theorems) {For the analytic theory, see 26C10, 30C15} 


12D15 
Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) [See also 11Exx] 


12D99 
None of the above, but in this section 