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发表于 2025-3-30 09:58:06
,Pfister’s Work on Sums of Squares,Historically the theory of quadratic forms was regarded as a topic in number theory. However, Witt’s paper “Theorie der quadratischen Formen in beliebigen Körpern” of 1937 opened up a new chapter in the theory: that of combining the number theoretic aspect with the algebraic development, by the creation of the famous Witt ring.
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