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Noncommutative sums
of squares
Scott McCullough and Mihai Putinar |
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Vol. 218 (2005), No. 1, 167–171
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Abstract |
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We present a proof of Helton’s sum-of-squares theorem based upon a theorem of Carathéodory and a Hahn–Banach separation argument. |
Milestones
Received: 15 November 2002
Published: 1 January 2005
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Authors |
| Scott McCullough | |
| Department of Mathematics University of Florida Gainesville, FL 32611-8105 |
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| Mihai Putinar | |
| Department of Mathematics University of California Santa Barbara, CA 93106 |
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