Hardy, G. H.; Wright, E. M. An introduction to the theory of numbers. 4th ed. (English) Zbl 0086.25803 Oxford: At the Clarendon Press. xvi, 421 p. (1960). Aus dem Vorwort der 4. Auflage: Apart from the provision of an index of names, the main changes in this edition are in the Notes at the end of each chapter. These have been revised to include references to results published since the third edition [(1954; Zbl 0058.03301)] went to press and to correct omissions. There are simpler proofs of Theorems 234, 352, and 357 and a new Theorem 272. The postscript to the third edition now takes it proper place as part of Chapter XX. Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 6 ReviewsCited in 449 Documents MSC: 11-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to number theory 11-02 Research exposition (monographs, survey articles) pertaining to number theory Citations:Zbl 0058.03301 PDF BibTeX XML OpenURL Online Encyclopedia of Integer Sequences: Sum of the quadratic residues of prime(n). a(n) is the sum of the quadratic residues of n. Least positive integer m such that m^6*n = w^6 + x^3 + y^3 + z^3 for some nonnegative integers w,x,y,z. Least positive integer m such that m^3*n = x^3 + y^3 + z^3 for some nonnegative integers x,y,z.