The length of \(x_1^4+x_2^4+x_3^4+x_4^4\) as a sum of squares

DOI10.1016/S0022-4049(00)00088-8zbMath0997.11034WikidataQ126977474 ScholiaQ126977474MaRDI QIDQ5928864

Paul Y. H. Yiu

Publication date: 4 April 2001

Published in: Journal of Pure and Applied Algebra (Search for Journal in Brave)

zbMATH Keywords

quartic formsum of three squares of homogeneous real quadratic forms

Mathematics Subject Classification ID

Sums of squares and representations by other particular quadratic forms (11E25)

Related Items (2)

An elementary proof that the length of \(X_1^4+X_2^4+X_3^4+X_4^4\) is 4. ⋮ Symmetry Adapted Gram Spectrahedra

Cites Work

• An algorithm for sums of squares of real polynomials
• A quantitative version of Hurwitz' theorem on the arithmetic-geometric inequality.
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