Representations of Integers as Sums of Nonvanishing Squares
Emil Grosswald
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Emil Grosswald: Temple University, College of Liberal Arts
Chapter Chapter 6 in Representations of Integers as Sums of Squares, 1985, pp 72-83 from Springer
Abstract:
Abstract It is clear that, for k ≥ 4, every nonnegative integer is representable as a sum of k squares. Indeed, one can always write $$ n = \sum\nolimits_{{i = 1}}^4 {x_i^2} + {0^2} + \cdot \cdot \cdot + {0^2} $$ , with an arbitrary number of zeros. On the other hand, the number of representations r k (n) increases very rapidly with n (see Chapter 12), and besides the representations with k — 4 zeros, one usually finds others with fewer zeros or none at all. For example, if k = 5, then 5 = 22 + 12 + 02 + 02 + 02 = 12 + 12 + 12 + 12 + 12.
Date: 1985
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-1-4613-8566-0_7
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DOI: 10.1007/978-1-4613-8566-0_7
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