Crossref Citations
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Narkiewicz, Władysław
2012.
Rational Number Theory in the 20th Century.
p.
13.
Published online by Cambridge University Press: 15 September 2014
1. A great deal of interest has of late years centred round the arithmetical function r(n), defined as the number of integer solutions of the equation
p2 + q2 = n,
so that, for example, r(1) = 4, the four solutions being (0, ±1) and (±1, 0).