Let $S_{3}(x)$ denote the number of positive integers not exceeding x which can be expressed as a sum of three squares. Can we find an asymptotic formula for $S_{3}(x)$, maybe using Landau-Ramanujan theorem?
2026-03-28 19:30:56.1774726256
Generalizing Landau-Ramanujan Theorem for sum of three squares
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