@article{Almontashery_Kalantan_2016, title={Results about the Alexandroff duplicate space}, volume={17}, url={https://polipapers.upv.es/index.php/AGT/article/view/4521}, DOI={10.4995/agt.2016.4521}, abstractNote={In this paper, we present some new results about the Â Alexandroff Duplicate Space. We prove that if a space X has the property P, then its Alexandroff Duplicate space A(X) may not have P, where P is one of the following properties: extremally disconnected, weakly extremally disconnected, quasi-normal, pseudo compact. We prove that if X is $\alpha$-normal, epinormal, or has property $\omega D$, then so is A(X). We prove almost normality is preserved by A(X) under special conditions.}, number={2}, journal={Applied General Topology}, author={Almontashery, Khulod and Kalantan, Lutfi}, year={2016}, month={Oct.}, pages={117â€“122} }