{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T14:23:21Z","timestamp":1777645401999,"version":"3.51.4"},"reference-count":0,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2020,10,31]],"date-time":"2020-10-31T00:00:00Z","timestamp":1604102400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Fundamenta Informaticae"],"published-print":{"date-parts":[[2020,10,31]]},"abstract":"<jats:p>We study multigranulation spaces of two equivalences. The lattice-theoretical properties of so-called \u201coptimistic\u201d and \u201cpessimistic\u201d multigranular approximation systems are given. We also consider the ordered sets of rough sets determined by these approximation pairs.<\/jats:p>","DOI":"10.3233\/fi-2020-1961","type":"journal-article","created":{"date-parts":[[2020,11,3]],"date-time":"2020-11-03T11:53:21Z","timestamp":1604404401000},"page":"17-41","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":2,"title":["The Structure of Multigranular Rough Sets"],"prefix":"10.1177","volume":"176","author":[{"given":"Jouni","family":"J\u00e4rvinen","sequence":"first","affiliation":[{"name":"Department of Mathematics and Statistics, University of Turku, 20014 Turku, Finland."}]},{"given":"S\u00e1ndor","family":"Radeleczki","sequence":"additional","affiliation":[{"name":"Institute of Mathematics, University of Miskolc, 3515 Miskolc-Egyetemv\u00e1ros, Hungary."}]}],"member":"179","published-online":{"date-parts":[[2020,10,31]]},"container-title":["Fundamenta Informaticae"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/FI-2020-1961","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/FI-2020-1961","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T06:32:08Z","timestamp":1777444328000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.3233\/FI-2020-1961"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,10,31]]},"references-count":0,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2020,10,31]]}},"alternative-id":["10.3233\/FI-2020-1961"],"URL":"https:\/\/doi.org\/10.3233\/fi-2020-1961","relation":{},"ISSN":["0169-2968","1875-8681"],"issn-type":[{"value":"0169-2968","type":"print"},{"value":"1875-8681","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,10,31]]}}}