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Signaturen, reelle Stellen und reduzierte quadratische Formen. (German) Zbl 0441.10019
MSC:
11E16 General binary quadratic forms
15A63 Quadratic and bilinear forms, inner products
12D15 Fields related with sums of squares (formally real fields, Pythagorean fields, etc.)
14Pxx Real algebraic and real-analytic geometry
11E10 Forms over real fields
11E08 Quadratic forms over local rings and fields
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