Erratum to: A fully discretised polynomial approximation on spherical shells

1 Erratum to: Int J Geomath DOI 10.1007/s13137-016-0084-1

In this article, the equations 6.27/6.28 should be

$$\begin{aligned} |f(x)-I_M f(x)|= & {} \left| \sum _{j=M+1}^\infty {a_j T_j^*(x)-\sum _{k\in \mathcal {I}(M)} {a_k T_{|v(k,M)|}^*(x)} } \right| \end{aligned}$$

(6.27)

$$\begin{aligned}\le & {} \sum _{k=M+1}^\infty {2|a_k |} . \end{aligned}$$

(6.28)