Curves between Lipschitz and $C^1$ and their relation to geometric knot theory

In this article we investigate regular curves whose derivatives have vanishing mean oscillations. We show that smoothing these curves using a standard mollifier one gets regular curves again. We apply this result to solve a couple of open problems. We show that curves with finite Möbius energy can be approximated by smooth curves in the energy space $W^{\frac 32,2}$ such that the energy converges which answers a question of He. Furthermore, we extend the result of Scholtes on the $Γ$-convergence of the discrete Möbius energies towards the Möbius energy and prove conjectures of Ishizeki and Nagasawa on certain parts of a decomposition of the Möbius energy. Finally, we extend a theorem of Wu on inscribed polygons to curves with derivatives with vanishing mean oscillation

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