Diophantine problems of additive type

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Diophantine equations, for which the problem posed is to find solutions in integers, which can at the same time be considered as additive problems, i.e. as problems of decomposition of an integer (arbitrary or meeting certain additional conditions) into terms of a desired type. Such problems include, for example, solutions in integers of the following equations:

(cf. Gauss number);

(cf. Lagrange theorem on the sum of four squares);

(cf. Integral point); as well as the Waring problem, etc. A Diophantine problem of additive type may also be regarded as the problem of finding the intersection of arithmetical sums of sets. For instance, the set of integer solutions of the equation is represented as , where


[1] I.M. Vinogradov, "Basic variants of the method of trigonometric sums" , Moscow (1976) (In Russian)
[2] A.O. Gel'fond, Yu.V. Linnik, "Elementary methods in the analytic theory of numbers" , M.I.T. (1966) (Translated from Russian)
[3] H.H. Ostmann, "Additive Zahlentheorie" , Springer (1956)
How to Cite This Entry:
Diophantine problems of additive type. Encyclopedia of Mathematics. URL:
This article was adapted from an original article by B.M. Bredikhin (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article