On the representations of a number as a sum of squares
T. Estermann (1937)
Prace Matematyczno-Fizyczne
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T. Estermann (1937)
Prace Matematyczno-Fizyczne
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T Estermann (1936)
Acta Arithmetica
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Jörg Brüdern (2014)
Bulletin of the Polish Academy of Sciences. Mathematics
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Asymptotic formulae are provided for the number of representations of a natural number as the sum of four and of three squares that are pairwise coprime.
Melham, Ray S. (2010)
Integers
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Roger Clement Crocker (2008)
Colloquium Mathematicae
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It can be shown that the positive integers representable as the sum of two squares and one power of k (k any fixed integer ≥ 2) have positive density, from which it follows that those integers representable as the sum of two squares and (at most) two powers of k also have positive density. The purpose of this paper is to show that there is an infinity of positive integers not representable as the sum of two squares and two (or fewer) powers of k, k again any fixed integer ≥ 2. ...
Shaun Cooper, Heung Yeung Lam, Dongxi Ye (2013)
Acta Arithmetica
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Ikramov, Kh.D., Matin Far, M. (2004)
Zapiski Nauchnykh Seminarov POMI
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Andrew Bremner (2001)
Acta Arithmetica
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Heng Huat Chan, Shaun Cooper, Wen-Chin Liaw (2008)
Acta Arithmetica
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James G. Huard, Kenneth S. Williams (2003)
Acta Arithmetica
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Ratko Tošić (1980)
Publications de l'Institut Mathématique
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Lefevre, James G., McCourt, Thomas A. (2011)
The Electronic Journal of Combinatorics [electronic only]
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Ford, David, Johnson, Kenneth W. (1996)
Experimental Mathematics
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John Hardy (1968)
Acta Arithmetica
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