Is there any result or tight bound on the cardinal of : $\{\textbf{z}\in\mathbb{Z}^n / \lVert\textbf{z}\rVert_2 \leq B\}$ for some positive $B$.
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2026-04-07 21:22:57.1775596977
Number of elements in $Z^n$ with norm 2 less than some positive B
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