ScalingStacks

Lemma 6.6 [058U]

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Lemma 6.6

Let ⟨.,.⟩\langle\,.\,,\,.\,\rangle be the standard metric on ℂ\mathbb{C}\,, and gg a positive real-valued function on ℂ\mathbb{C}\,. Then with respect to the metric g⟨.,.⟩g\langle\,.\,,\,.\,\rangle, the mean curvature vector of a curve γ⊂ℂ\gamma\subset\mathbb{C}\, is, in terms of the standard mean curvature vector MCV\MCV (and calculating the unit normal 𝐧\mathbf{n} in the standard metric),

1g​(MCV−12​𝐧​(log⁡g)​𝐧).{1\over g}\left(\MCV-{1\over 2}\mathbf{n}(\log g)\,\mathbf{n}\right).

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