@article{article_1217130, title={Dominions and closed varieties of bands}, journal={Hacettepe Journal of Mathematics and Statistics}, volume={53}, pages={382–391}, year={2024}, DOI={10.15672/hujms.1217130}, author={Abbas, Shabnam and Ashraf, Wajih and Khan, Noor Mohammad}, keywords={identity, varieties, zigzag equations, dominion, bands, rectangular, normal, regular, left semiregular}, abstract={We show that all subvarieties of the variety of rectangular bands are closed in the variety of $n$-nilpotent extension of bands. Ahanger, Nabi and Shah in [1] have proved that the variety of regular bands is closed. In this paper, we improve this result and provide its simple and shorter proof. Finally, we show that all subvarieties of the variety of normal bands are closed in the variety of left [right] semiregular bands.}, number={2}, publisher={Hacettepe University}