Triangular Numbers and the Representation of Integers as Sums of Four Squares
After the discussion of representations as sums of two squares, it appears reasonable to consider next the case of representations as sums of three squares. However, as already indicated, the case of k odd is more difficult than that of k even and, what is more important, requires different methods.
KeywordsElliptic Function Theta Function Chapter VIII Distinct Representation Elegant Proof
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