Correction to: $C_0$-positivity and a classification of closed three-dimensional CR torsion solitons

1 Correction to: Mathematische Zeitschrift https://doi.org/10.1007/s00209-020-02471-2

In the original article, the equation 2.4 was incorrectly published as

$$\begin{aligned} d\theta _{1}{}^{1}=W\theta ^{1}\wedge \theta ^{{\bar{1}}}+2i \mathrm {Im}(A^{ {\bar{1}}}{}_{1,{\bar{1}}}\theta ^{1}\wedge \theta ), \end{aligned}$$

The correct equation should read as

$$\begin{aligned} d\theta _{1}{}^{1}=W\theta ^{1}\wedge \theta ^{{\bar{1}}}+2i {\mathrm{Im}}\left( A^{{\bar{1}}}{}_{1,{\bar{1}}}\theta ^{1}\wedge \theta \right) . \end{aligned}$$

The original article has been corrected.