> 12-XX Field theory and polynomials > 12DXX Real and complex fields

12D05 Polynomials: factorization	12D10 Polynomials: location of zeros (algebraic theorems)	12D15 Fields related with sums of squares (formally real fields, Pythagorean fields, etc.)
12D99 None of the above, but in this section

12DXX Real and complex fields