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11E81 - Algebraic theory of quadratic forms; Witt groups and rings [MSC 2020] |
12-XX - Field theory and polynomials [MSC 2020] |
12D15 - Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) [MSC 2020] |
12J20 - General valuation theory for fields [MSC 2020] |
13A18 - Valuations and their generalizations for commutative rings [MSC 2020] |
13J30 - Real algebra [MSC 2020] |
14P05 - Real algebraic sets [MSC 2020] |
14P10 - Semialgebraic sets and related spaces [MSC 2020] |