TY - JOUR T1 - On the Lindel of Spaces by Using coc-r-Open Sets AU - Hussain Al-Abdulla, Raad Aziz AU - Attala Shneef, Fadhel JO - Journal of Engineering and Applied Sciences VL - 13 IS - 24 SP - 10203 EP - 10212 PY - 2018 DA - 2001/08/19 SN - 1816-949x DO - jeasci.2018.10203.10212 UR - https://makhillpublications.co/view-article.php?doi=jeasci.2018.10203.10212 KW - coc-r-$-open and coc-r-regular KW -coc-r-open KW -open sets KW -l-coc-r-Lindelof KW -coc-r-extremally disconnected KW -coc-r-Lindelof and I-coc-r-Lindelof spaces AB - The purpose of this research is to extend and study types of topological spaces as Lindelof spaces by using coc-r-open sets. In this study, we study and introduce the concepts of coc-r-open sets. A special intrest types of spaces called coc-r-Lindelof and I-coc-r-Lindelof are studied and obtain some of their basic properties.We introduce new types of functions using coc-r-open sets. Moreover, the relation between Lindelof, I-Lindelof, coc-r-Lindelof and I-coc-r-Lindelof spaces are studied and investigated the topological properties of them using coc-r-open sets. ER -