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In mathematics, the universal invariant or u-invariant of a field describes the structure of quadratic forms over the field.
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References
- ↑ The Mathematics Genealogy Project - Richard Elman, retrieved 2013-07-08.
- ↑ List of Fellows of the American Mathematical Society, retrieved 2013-07-08.
- ↑ Zaldivar, Felipe (9 November 2008). "Review of The Algebraic and Geometric Theory of Quadratic Forms by R. Elman, N. Karpenko, and A. Merkurjev". MAA Reviews, Mathematical Association of America.
