eprintid: 3156 rev_number: 10 eprint_status: archive userid: 307 dir: disk0/00/00/31/56 datestamp: 2018-11-14 04:30:54 lastmod: 2018-11-14 04:30:54 status_changed: 2018-11-14 04:30:54 type: book_section metadata_visibility: show creators_name: Ha, Quang Thuy creators_name: Nguyen, Linh Anh creators_name: Nguyen, Thi Hong Khanh creators_name: Tran, Thanh Luong creators_id: thuyhq@vnu.edu.vn corp_creators: Faculty of Information TechnologyVNU University of Engineering and TechnologyHanoiVietnam corp_creators: Division of Knowledge and System Engineering for ICT, Faculty of Information TechnologyTon Duc Thang UniversityHo Chi Minh CityVietnam corp_creators: Institute of InformaticsUniversity of WarsawWarsawPoland corp_creators: Faculty of Information TechnologyElectricity Power UniversityHanoiVietnam corp_creators: Department of Information TechnologyUniversity of Sciences, Hue UniversityHueVietnam title: Fuzzy Bisimulations in Fuzzy Description Logics Under the Gödel Semantics ispublished: pub subjects: IT divisions: fac_fit abstract: Description logics (DLs) are a suitable formalism for representing knowledge about domains in which objects are described not only by attributes but also by binary relations between objects. Fuzzy DLs can be used for such domains when data and knowledge about them are vague. One of the possible ways to specify classes of objects in such domains is to use concepts in fuzzy DLs. As DLs are variants of modal logics, indiscernibility in DLs is characterized by bisimilarity. The bisimilarity relation of an interpretation is the largest auto-bisimulation of that interpretation. In (fuzzy) DLs, it can be used for concept learning. In this paper, for the first time, we define fuzzy bisimulation and (crisp) bisimilarity for fuzzy DLs under the Gödel semantics. The considered logics are fuzzy extensions of the DL ALCreg with additional features among inverse roles, nominals, qualified number restrictions, the universal role and local reflexivity of a role. We give results on invariance of concepts as well as conditional invariance of TBoxes and ABoxes for bisimilarity in fuzzy DLs under the Gödel semantics. We also provide a theorem on the Hennessy-Milner property for fuzzy bisimulations in fuzzy DLs under the Gödel semantics. date: 2018 date_type: published publisher: Springer official_url: https://link.springer.com/chapter/10.1007%2F978-3-319-99368-3_44 full_text_status: public series: Lecture Notes in Computer Science number: 11103 pagerange: 559-571 pages: 50 refereed: FALSE isbn: ISBN 978-3-319-99367-6 book_title: International Joint Conference on Rough Sets (IJCRS 2018) editors_name: Nguyen, Hung Son editors_name: Ha, Quang-Thuy editors_name: Li, Tianrui editors_name: Malgorzata, Przybyla-Kasperek citation: Ha, Quang Thuy and Nguyen, Linh Anh and Nguyen, Thi Hong Khanh and Tran, Thanh Luong (2018) Fuzzy Bisimulations in Fuzzy Description Logics Under the Gödel Semantics. In: International Joint Conference on Rough Sets (IJCRS 2018). Lecture Notes in Computer Science (11103). Springer, pp. 559-571. ISBN ISBN 978-3-319-99367-6 document_url: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3156/1/18_03_IJCRS2018_Book_RoughSets.pdf