1 Correction to: Bull. Malays. Math. Sci. Soc. (2021) 44:3991–4002 https://doi.org/10.1007/s40840-021-01119-6

The Funding information section was missing from this article and should have read ‘The first author was supported by Zhejiang Provincial Natural Science Foundation of China Grant LQ21A010005.'

The original article has been corrected.