# Tagged Questions

Question on minimal surfaces, or surfaces that have zero mean curvature.

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### Is $(x,y,\ln(\cos x/\cos y))$ a minimal surface?

Is the surface $(x,y,\ln(\cos x/\cos y))$ minimal? Direct calculation of the first fundamental form seems to get one bogged down in trig functions particularly since it is not diagonal.
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### set up Surface Evolver with volume constraint in spherical space?

I don't really expect an answer here, but I don't know anywhere else to ask; there seems to be no Surface Evolver forum. Inspired by the examples shown of triply periodic minimal surfaces, ...
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### How is the Euclidean mean curvature of a minimal submanifold of $\mathbb{S^{n-1}}$ is equal to the metric Laplacian of the position vector?

I am reading about minimal cones from the book "A Course in Minimal Surfaces, T.H Colding, W.P Minicozzi II". It says that if $N^{k-1} \subset \mathbb{S^{n-1}}$ is $k-1$ dimensional minimal ...
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### When is a stable domain in a minimal surface area minimizing?

A stable domain $D$ in a minimal surface $S\subset \mathbb{R}^3$ is a domain for which the area-functional $A(t):=\int_{S_t}dS_t$ has non-negative second derivative, i.e. $A''(0)\geq 0$, for all ...
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