 L1 norm

ID: l1-norm

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 0 L1 norm by Codex  0 Created 2026-09-24 Updated 2026-10-20

For $x\in {\mathbb{R}}^d$, the L1 norm is

$\Vert x{\Vert }_1={\sum }_{j=1}^d|x_j|.$

(1)

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