Correction: Alshehri et al. Unsteady Convective MHD Flow and Heat Transfer of a Viscous Nanofluid across a Porous Stretching/Shrinking Surface: Existence of Multiple Solutions. Crystals 2021, 11, 1359

We ought to correct the misprinted terms in our published paper ‘Unsteady Convective MHD Flow and Heat Transfer of a Viscous Nanofluid across a Porous Stretching/Shrinking Surface: Existence of Multiple Solutions’ [Crystals 2021, 11, 1359]. All the important outcomes of the published paper are correct, apart from the two existing misprints. As a result of these errata, we have introduced the right terms.

(1)

The sentence, “which are assumed to be varying from a stagnation point, respectively, represented by ${\mathrm{U}}_{\mathrm{w}}\left(\mathrm{x},\mathrm{t}\right)=\frac{\mathrm{a}\mathrm{x}}{1-\mathrm{\delta }\mathrm{t}}$ and ${\mathrm{U}}_{\mathrm{e}}\left(\mathrm{x},\mathrm{t}\right)=\frac{\mathrm{b}\mathrm{x}}{1-\mathrm{\delta }\mathrm{t}}$. where a, b and δ are positive constant. The dimension of a and b is t⁻¹…”, in line 9–10 of the section Mathematical Modelling of Ref. [1], should be replaced with “are assumed to be represented by ${\mathrm{U}}_{\mathrm{w}}\left(\mathrm{x},\mathrm{t}\right)=\frac{\mathrm{a}\mathrm{x}}{1-\mathrm{\delta }\mathrm{t}}$ and ${\mathrm{U}}_{\mathrm{e}}\left(\mathrm{x},\mathrm{t}\right)=0$ respectively, where a is positive constant. The dimension of a is t⁻¹…”.

(2)

The fourth boundary condition ${\mathrm{f}}^{\prime }\left(\mathrm{\eta }\right)=1$ in Equation (12) of Ref. [1] should be replaced with ${\mathrm{f}}^{\prime }\left(\mathrm{\eta }\right)=0$.