# Method of nose stretching in Newton's problem of minimal resistance

13 Apr 2020 Plakhov Alexander

We consider the problem $\inf\big\{ \int\!\!\int_\Omega (1 + |\nabla u(x,y)|^2)^{-1} dx dy : \text{ the function } u : \Omega \to \mathbb{R} \text{ is concave and } 0 \le u(x,y) \le M \text{ for all } (x,y) \in \Omega =\{ (x,y): x^2 + y^2 \le 1 \} \, \big\}$ (Newton's problem) and its generalizations. In the paper \cite{BrFK} it is proved that if a solution $u$ is $C^2$ in an open set $\mathcal{U} \subset \Omega$ then $\det D^2u = 0$ in $\mathcal{U}$... (read more)

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• OPTIMIZATION AND CONTROL
• METRIC GEOMETRY