A Positive Definite Binary Quadratic Form as a Sum of Five Squares of Linear Forms (Completion of Mordell's Proof)
A. Schinzel
Bulletin of the Polish Academy of Sciences. Mathematics, Tome 61 (2013), p. 23-26 / Harvested from The Polish Digital Mathematics Library
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The paper completes an incomplete proof given by L. J. Mordell in 1930 of the following theorem: every positive definite classical binary quadratic form is the sum of five squares of linear forms with integral coefficients.

Publié le : 2013-01-01
EUDML-ID : urn:eudml:doc:281208 
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     title = {A Positive Definite Binary Quadratic Form as a Sum of Five Squares of Linear Forms (Completion of Mordell's Proof)},
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A. Schinzel. A Positive Definite Binary Quadratic Form as a Sum of Five Squares of Linear Forms (Completion of Mordell's Proof). Bulletin of the Polish Academy of Sciences. Mathematics, Tome 61 (2013) pp. 23-26. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ba61-1-3/