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Matematicheskaya Fizika, Analiz, Geometriya [Mathematical Physics, Analysis, Geometry], 1996, Volume 3, Number 1/2, Pages 125–130
(Mi jmag487)
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Closed convex surfaces in $E^3$ with given functions of curvatures
A. I. Medianik B. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, Khar'kov
Abstract:
It is proved that there are a regular closed convex surface $S$ and a constant vector $c$ for which the equality $$K^{-1}+H^{-\alpha}+c\mathbf n=\varphi(\mathbf n)$$ is realized at a point with external normal $\mathbf n$.
Here $K$ and $H$ are the Gauss and mean curvatures of $S$ at the point with normal $\mathbf n$, $\varphi(\mathbf n)$ is a given regular function on sphere, which satisfies the closeness condition and the inequality $$\operatorname{inf}\varphi>\frac9{32}\biggl[1+\sqrt{1+\frac{64}9(\operatorname{sup}\varphi)^{2-\alpha}}\biggr](\operatorname{sup}\varphi)^{\alpha-1},$$ $\alpha\in(0,1]$. The solution $(S,c)$ is unique with a translation.
Received: 09.06.1994
Citation:
A. I. Medianik, “Closed convex surfaces in $E^3$ with given functions of curvatures”, Mat. Fiz. Anal. Geom., 3:1/2 (1996), 125–130
Linking options:
https://www.mathnet.ru/eng/jmag487 https://www.mathnet.ru/eng/jmag/v3/i1/p125
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