Dual norm

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Given the norm is LaTeX: L_p, where LaTeX: p \ge 1, its dual norm is LaTeX: L_q, where LaTeX: (1/p) + (1/q) = 1. Note, if LaTeX: p=1 then LaTeX: q=\infty, and if LaTeX: q=1 then LaTeX: p=\infty. This is based on Hölder's inequality.

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