{"id":"https://openalex.org/W2005688979","doi":"https://doi.org/10.1016/j.tcs.2007.02.068","title":"Ultraproducts and possible worlds semantics in institutions","display_name":"Ultraproducts and possible worlds semantics in institutions","publication_year":2007,"publication_date":"2007-03-27","ids":{"openalex":"https://openalex.org/W2005688979","doi":"https://doi.org/10.1016/j.tcs.2007.02.068","mag":"2005688979"},"language":"en","primary_location":{"id":"doi:10.1016/j.tcs.2007.02.068","doi":"https://doi.org/10.1016/j.tcs.2007.02.068","is_oa":true,"landing_page_url":"https://doi.org/10.1016/j.tcs.2007.02.068","pdf_url":"https://www.sciencedirect.com/science/article/pii/S0304397507001673/pdf","source":{"id":"https://openalex.org/S90727058","display_name":"Theoretical Computer Science","issn_l":"0304-3975","issn":["0304-3975","1879-2294"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","ccf-b","cwts-core","dongbi-c","jufo-2","ki-jl-2","norway-2","poland-100","russia-white-list-3","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Theoretical Computer Science","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://www.sciencedirect.com/science/article/pii/S0304397507001673/pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5004995921","display_name":"R\u0103zvan Diaconescu","orcid":"https://orcid.org/0000-0002-8178-9538","observed_orcids":["https://orcid.org/0000-0002-8178-9538","https://orcid.org/0000-0003-0428-236X"]},"institutions":[{"id":"https://openalex.org/I4405262991","display_name":"IMAR - Institutul de Matematic\u0103 \u201eSimion Stoilow\u201d al Academiei Rom\u00e2ne","ror":"https://ror.org/0122mh736","country_code":"RO","type":"education","lineage":["https://openalex.org/I4405262991","https://openalex.org/I58077936"]}],"countries":["RO"],"is_corresponding":true,"raw_author_name":"R\u0103zvan Diaconescu","raw_affiliation_strings":["Institute of Mathematics of the Romanian Academy, Bucharest, Romania","Institute of Mathematics of the Romanian Academy , Bucharest , Romania"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Mathematics of the Romanian Academy, Bucharest, Romania","institution_ids":["https://openalex.org/I4405262991"]},{"raw_affiliation_string":"Institute of Mathematics of the Romanian Academy , Bucharest , Romania","institution_ids":["https://openalex.org/I4405262991"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5067450953","display_name":"Petros Sotirios Stefaneas","orcid":"https://orcid.org/0000-0002-2096-9914","observed_orcids":["https://orcid.org/0000-0002-2096-9914"]},"institutions":[{"id":"https://openalex.org/I174458059","display_name":"National Technical University of Athens","ror":"https://ror.org/03cx6bg69","country_code":"GR","type":"education","lineage":["https://openalex.org/I174458059"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Petros Stefaneas","raw_affiliation_strings":["National Technical University, Athens, Greece"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Technical University, Athens, Greece","institution_ids":["https://openalex.org/I174458059"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5004995921"],"corresponding_institution_ids":["https://openalex.org/I4405262991"],"apc_list":{"value":2880,"currency":"USD","value_usd":2880},"apc_paid":null,"fwci":0.3928,"has_fulltext":true,"cited_by_count":29,"citation_normalized_percentile":{"value":0.73288603,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"379","issue":"1-2","first_page":"210","last_page":"230"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.8593999743461609,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.8593999743461609,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.12430000305175781,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10126","display_name":"Logic, programming, and type systems","score":0.006399999838322401,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/ultraproducts","display_name":"ultraproducts","score":0.8709999918937683},{"id":"https://openalex.org/keywords/possible-worlds-semantics","display_name":"Kripke semantics","score":0.9620000123977661},{"id":"https://openalex.org/keywords/institutions","display_name":"institutions","score":0.9589999914169312},{"id":"https://openalex.org/keywords/abstract-model-theory","display_name":"abstract model theory","score":0.8840000033378601},{"id":"https://openalex.org/keywords/compactness","display_name":"compactness","score":0.6769999861717224},{"id":"https://openalex.org/keywords/categorical-logic","display_name":"categorical logic","score":0.5049999952316284},{"id":"https://openalex.org/keywords/logical-systems","display_name":"logical systems","score":0.46700000762939453}],"concepts":[{"id":"https://openalex.org/C167930466","wikidata":"https://www.wikidata.org/wiki/Q1535225","display_name":"Ultraproduct","level":2,"score":0.8951109647750854},{"id":"https://openalex.org/C184337299","wikidata":"https://www.wikidata.org/wiki/Q1437428","display_name":"Semantics (computer science)","level":2,"score":0.6948564052581787},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.593285083770752},{"id":"https://openalex.org/C156325763","wikidata":"https://www.wikidata.org/wiki/Q1930895","display_name":"Operational semantics","level":3,"score":0.4861154556274414},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.47250306606292725},{"id":"https://openalex.org/C146499914","wikidata":"https://www.wikidata.org/wiki/Q5469969","display_name":"Formal semantics (linguistics)","level":2,"score":0.4300094246864319},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.3623196482658386},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.279018759727478},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.24129396677017212},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.20068660378456116}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1016/j.tcs.2007.02.068","doi":"https://doi.org/10.1016/j.tcs.2007.02.068","is_oa":true,"landing_page_url":"https://doi.org/10.1016/j.tcs.2007.02.068","pdf_url":"https://www.sciencedirect.com/science/article/pii/S0304397507001673/pdf","source":{"id":"https://openalex.org/S90727058","display_name":"Theoretical Computer Science","issn_l":"0304-3975","issn":["0304-3975","1879-2294"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","ccf-b","cwts-core","dongbi-c","jufo-2","ki-jl-2","norway-2","poland-100","russia-white-list-3","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Theoretical Computer Science","raw_type":"journal-article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.101.1262","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.101.1262","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.imar.ro/~diacon/PDF/ks_tcs.pdf","raw_type":"text"},{"id":"pmh:oai:dspace.lib.ntua.gr:123456789/18492","doi":null,"is_oa":true,"landing_page_url":"http://doi.org/10.1016/j.tcs.2007.02.068","pdf_url":null,"source":{"id":"https://openalex.org/S4377196837","display_name":"DSpace - NTUA (National Technical University of Athens)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I174458059","host_organization_name":"National Technical University of Athens","host_organization_lineage":["https://openalex.org/I174458059"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Theoretical Computer Science","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"doi:10.1016/j.tcs.2007.02.068","doi":"https://doi.org/10.1016/j.tcs.2007.02.068","is_oa":true,"landing_page_url":"https://doi.org/10.1016/j.tcs.2007.02.068","pdf_url":"https://www.sciencedirect.com/science/article/pii/S0304397507001673/pdf","source":{"id":"https://openalex.org/S90727058","display_name":"Theoretical Computer Science","issn_l":"0304-3975","issn":["0304-3975","1879-2294"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","ccf-b","cwts-core","dongbi-c","jufo-2","ki-jl-2","norway-2","poland-100","russia-white-list-3","vabb-shw"],"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Theoretical Computer Science","raw_type":"journal-article"},"sustainable_development_goals":[],"sustainable_development_goals_aurora":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2005688979.pdf","grobid_xml":"https://content.openalex.org/works/W2005688979.grobid-xml"},"referenced_works_count":62,"referenced_works":["https://openalex.org/W96813198","https://openalex.org/W206056444","https://openalex.org/W423830787","https://openalex.org/W566459404","https://openalex.org/W577129422","https://openalex.org/W657159919","https://openalex.org/W1481995329","https://openalex.org/W1497851939","https://openalex.org/W1531377243","https://openalex.org/W1537741699","https://openalex.org/W1539123436","https://openalex.org/W1545803195","https://openalex.org/W1551861123","https://openalex.org/W1566103579","https://openalex.org/W1574129634","https://openalex.org/W1576273408","https://openalex.org/W1612453857","https://openalex.org/W1647005630","https://openalex.org/W1970603830","https://openalex.org/W1971240584","https://openalex.org/W1974483963","https://openalex.org/W1974817955","https://openalex.org/W1975230264","https://openalex.org/W1976195354","https://openalex.org/W1978469611","https://openalex.org/W1997632084","https://openalex.org/W2005494456","https://openalex.org/W2010883554","https://openalex.org/W2017041211","https://openalex.org/W2049362364","https://openalex.org/W2060430979","https://openalex.org/W2068106852","https://openalex.org/W2094090571","https://openalex.org/W2099684895","https://openalex.org/W2104108562","https://openalex.org/W2112503809","https://openalex.org/W2120713972","https://openalex.org/W2132027927","https://openalex.org/W2132371811","https://openalex.org/W2132750992","https://openalex.org/W2155581733","https://openalex.org/W2158701616","https://openalex.org/W2176705267","https://openalex.org/W2180313053","https://openalex.org/W2228792864","https://openalex.org/W2326194478","https://openalex.org/W2336123333","https://openalex.org/W2340102009","https://openalex.org/W2482992533","https://openalex.org/W2489393578","https://openalex.org/W2495451020","https://openalex.org/W2573958660","https://openalex.org/W2574983198","https://openalex.org/W2610670723","https://openalex.org/W2735233375","https://openalex.org/W2791791034","https://openalex.org/W2799061192","https://openalex.org/W3127823229","https://openalex.org/W4205313167","https://openalex.org/W4285719527","https://openalex.org/W6632183182","https://openalex.org/W6634064020"],"related_works":["https://openalex.org/W2160196023","https://openalex.org/W2100934637","https://openalex.org/W2245685274","https://openalex.org/W2188386601","https://openalex.org/W2788308474","https://openalex.org/W3007870257","https://openalex.org/W1495012123","https://openalex.org/W2610513781","https://openalex.org/W2146445117","https://openalex.org/W2158105805"],"abstract_inverted_index":null,"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":4},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":2},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":4},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":4},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":1}],"updated_date":"2026-10-16T09:59:22.235173","created_date":"2025-10-10T00:00:00"}
