Pfister's theorem for varieties and reduced Witt rings
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Publication:1080905
DOI10.1007/BF01388792zbMath0601.14019MaRDI QIDQ1080905
Publication date: 1986
Published in: Inventiones Mathematicae (Search for Journal in Brave)
Full work available at URL: https://eudml.org/doc/143359
Pythagoras numbersum of squaresPfister theoremsemi-algebraic open setWitt ring of the coordinate ring
Waring's problem and variants (11P05) Fields related with sums of squares (formally real fields, Pythagorean fields, etc.) (12D15) Semialgebraic sets and related spaces (14P10)
Related Items (13)
Application signature et anneaux archimédiens ⋮ About the image of the total signature map in the two-dimensional case ⋮ On the separation of connected components by étale cohomology ⋮ Minimal generation of basic open semianalytic sets ⋮ On the Mostowski number ⋮ Algorithme de multiplicativité des sommes de carrés ⋮ The Witt group of real surfaces ⋮ Aspects quantitatifs de nullstellensätze et de positivstellensätze. nombres de pythagore ⋮ On the Pythagoras numbers of real analytic surfaces☆ ⋮ Stability index of real varieties ⋮ Level and Pythagoras number of some geometric rings ⋮ The Witt group of real algebraic varieties ⋮ Witt group and torsion Picard group of real curves
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- Zur Darstellung definiter Funktionen als Summe von Quadraten. (To the representation of definite functions as the sum of squares)
- On quasi algebraic closure
- The Witt Ring of a Space of Ordering
- Levels in algebra and topology
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