{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T14:28:32Z","timestamp":1777645712057,"version":"3.51.4"},"reference-count":0,"publisher":"SAGE Publications","issue":"1-4","license":[{"start":{"date-parts":[[2010,1,1]],"date-time":"2010-01-01T00:00:00Z","timestamp":1262304000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Fundamenta Informaticae"],"published-print":{"date-parts":[[2010,6]]},"abstract":"<jats:p>In this paper we present a point-free theory of Whiteheadean style\n\t\t\t of space and time. Its algebraic formulation, called dynamic contact algebra\n\t\t\t (DCA), is a Boolean algebra whose elements symbolized dynamic regions changing\n\t\t\t in time, with two spatio-temporal mereotopological relations between them:\n\t\t\t stable and unstable contact. We prove several representation theorems for DCAs,\n\t\t\t representing them in structures arising from products of contact algebras or\n\t\t\t from products of topological spaces. We also present a decidable\n\t\t\t quantifier-free constraint logic for reasoning about stable and unstable\n\t\t\t mereotopological relations between dynamic regions. We consider the paper as a\n\t\t\t first step in point-free dynamic mereotopology.<\/jats:p>","DOI":"10.3233\/fi-2010-268","type":"journal-article","created":{"date-parts":[[2019,12,2]],"date-time":"2019-12-02T23:09:29Z","timestamp":1575328169000},"page":"159-180","source":"Crossref","is-referenced-by-count":7,"title":["Dynamic Mereotopology: A Point-free Theory of Changing Regions. I.\t\t\t Stable and unstable mereotopological relations"],"prefix":"10.1177","volume":"100","author":[{"given":"Dimiter","family":"Vakarelov","sequence":"first","affiliation":[{"name":"Sofia University, Faculty of Mathematics and Computer\r\t\t\t Science blvd James Bouchier 5, 1126 Sofia, Bulgaria.\r\t\t\t E-mail: dvak@fmi.univ-sofia.bg"}]}],"member":"179","published-online":{"date-parts":[[2010,1]]},"container-title":["Fundamenta Informaticae"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/FI-2010-268","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/FI-2010-268","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T06:33:04Z","timestamp":1777444384000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.3233\/FI-2010-268"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,1]]},"references-count":0,"journal-issue":{"issue":"1-4","published-print":{"date-parts":[[2010,6]]}},"alternative-id":["10.3233\/FI-2010-268"],"URL":"https:\/\/doi.org\/10.3233\/fi-2010-268","relation":{},"ISSN":["0169-2968","1875-8681"],"issn-type":[{"value":"0169-2968","type":"print"},{"value":"1875-8681","type":"electronic"}],"subject":[],"published":{"date-parts":[[2010,1]]}}}