1 Correction to: Bull. Math. Sci. https://doi.org/10.1007/s13373-018-0116-2

The author would like to correct the errors in the publication of the original article. The corrected details are given below for your reading.

Equation \((1.4)^{\prime }\) should read as

$$\begin{aligned} \mathcal {S}^{\prime }_s (\mathbf{R }^{d})=\bigcap _{h>0} \mathcal {S}^{\prime }_{s,h} (\mathbf{R }^{d}) {\text { and }} \Sigma _t^{\prime } {(\mathbf{R }^{d})} =\bigcup _{h>0} \mathcal {S}^{\prime }_{t,h} (\mathbf{R }^{d}). \qquad \qquad (1.4)^{\prime } \end{aligned}$$

The original article has been corrected.