A flow approach to the $L_{-2}$ Minkowski problem

We prove that the set of smooth, $π$-periodic, positive functions on the unit circle for which the $L_{-2}$ Minkowski problem is solvable is dense in the set of all smooth, $π$-periodic, positive functions on the unit circle with respect to the $L^{\infty}$ norm. Furthermore, we obtain a necessary condition on the solvability of the even $L_{-2}$ Minkowski problem. At the end, we prove uniqueness of the solutions up to an affine linear transformation.

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