Talk:Mean curvature

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This article needs some serious rewording, but I don't know enough about the subject to write it. 65.25.226.98 22:07, 8 October 2005 (UTC)

• The formula for axissymmetric 3D-curvature is not correct, or is it? 1 / r should not appear in the formula, maybe it is1 / S(r)? 131.188.102.71 (talk) 16:11, 18 December 2007 (UTC)

• Can someone discuss minimal surfaces which are constrained by volume?

For instance a sphere with two equivalent circular plates at each end would deflate but maintain a 'circular' curvature until deflating into a cilindar and then into a rotated ctenary (I think). Or if the plates are asku then the surface would be a sphere only at one volume.

Since these can be entierly convex what defines the surface?

Email me User:Timothy Sheridan

• The Description of the Principal Curvature in Fact is wrong. If one takes the Max. or Min. over all the curvatures of curves passing through q, this terms are not even defined. They occur as Inf. and Sup. and are always zero resp. infinity. One has to look at curves that "occur" by intersecting the surface with a 2-plane in q, and this 2-plane has to be perpendicular to the tangent space at q. I am not able to correct this on my own, perhaps someone else would like to. —Preceding unsigned comment added by 80.143.251.206 (talk) 20:12, 29 May 2008 (UTC)