Geodesic
A Positive Definite Binary Quadratic Form as a Sum of Five Squares of Linear Forms (Completion of Mordell's Proof)
A. Schinzel 1
1 Institute of Mathematics Polish Academy of Sciences Śniadeckich 8 00-956 Warszawa, Poland
Bulletin of the Polish Academy of Sciences. Mathematics, Tome 61 (2013) no. 1, pp. 23-26 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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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.
DOI : 10.4064/ba61-1-3
Keywords: paper completes incomplete proof given mordell following theorem every positive definite classical binary quadratic form sum five squares linear forms integral coefficients

A. Schinzel  1

1 Institute of Mathematics Polish Academy of Sciences Śniadeckich 8 00-956 Warszawa, Poland 
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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) no. 1, pp. 23-26. doi: 10.4064/ba61-1-3

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