Last Updated
：2025/11/20
two-norm
（ plural ）
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(mathematics) A measure of length given by the square root of the squares.
Denoted by ||·||₂, the two-norm of a vector ⃑v= is ||⃑v||₂=√. The two norm of an m⨯m matrix A is defined by max _(⃑v≠⃑0)|/} where ⃑v is an m-dimensional vector that is not the zero vector.
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two-norm
When solving the least squares problem, the two-norm of the residual vector is minimized to obtain the best approximation.
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When solving the least squares problem, the two-norm of the residual vector is minimized to obtain the best approximation.
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