Geodesic
The Pythagoras number of some affine algebras and local algebras.
Journal für die reine und angewandte Mathematik, Tome 336 (1982), pp. 45-82.

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Mots-clés : Pythagoras number, affine algebras, local algebras, sum of squares, arithmetic invariant, Pfister dimension, Quadratstufe, reduced height 
@article{JRAM_1982__336_152469,
     author = {T.Y. Lam and M.D. Choi and Z.D. Dai},
     title = {The {Pythagoras} number of some affine algebras and local algebras.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {45--82},
     publisher = {mathdoc},
     volume = {336},
     year = {1982},
     zbl = {0499.12018},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1982__336_152469/}
}
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T.Y. Lam; M.D. Choi; Z.D. Dai. The Pythagoras number of some affine algebras and local algebras.. Journal für die reine und angewandte Mathematik, Tome 336 (1982), pp. 45-82. http://geodesic.mathdoc.fr/item/JRAM_1982__336_152469/