12-00 General reference works (handbooks, dictionaries, bibliographies, etc.) pertaining to field theory 9

12D10 Polynomials in real and complex fields: location of zeros (algebraic theorems) {For the analytic theory, see 26C10, 30C15} 1325

12D15 Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) [See also 11Exx] 799