Hereditarily-Pythagorean fields and orderings of higher level. (English) Zbl 0509.12020
MSC:
12D15 | Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) |
12J20 | General valuation theory for fields |
12J15 | Ordered fields |
12-02 | Research exposition (monographs, survey articles) pertaining to field theory |
14F22 | Brauer groups of schemes |
11E16 | General binary quadratic forms |
12J10 | Valued fields |
11E76 | Forms of degree higher than two |