{"id":"https://openalex.org/W2065657608","doi":"https://doi.org/10.1002/malq.19780243108","title":"Superclasses in a Finite Extension of Zermelo Set Theory","display_name":"Superclasses in a Finite Extension of Zermelo Set Theory","publication_year":1978,"publication_date":"1978-01-01","ids":{"openalex":"https://openalex.org/W2065657608","doi":"https://doi.org/10.1002/malq.19780243108","mag":"2065657608"},"language":"en","primary_location":{"id":"doi:10.1002/malq.19780243108","is_oa":false,"landing_page_url":"https://doi.org/10.1002/malq.19780243108","pdf_url":null,"source":{"id":"https://openalex.org/S172351290","display_name":"Mathematical logic quarterly","issn_l":"0044-3050","issn":["0044-3050","0942-5616","1521-3870"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Mathematical Logic Quarterly","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5010105203","display_name":"M Kuhnrich","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Martin K\u00fchnrich","raw_affiliation_strings":["Berlin (GDR)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Berlin (GDR)","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5010105203"],"corresponding_institution_ids":[],"apc_list":{"value":2900,"currency":"USD","value_usd":2900},"apc_paid":null,"fwci":0.5243,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.65369261,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"24","issue":"31-36","first_page":"539","last_page":"552"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.9925000071525574,"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"}},"topics":[{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.9925000071525574,"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/T12558","display_name":"Wittgensteinian philosophy and applications","score":0.9513999819755554,"subfield":{"id":"https://openalex.org/subfields/1211","display_name":"Philosophy"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T11151","display_name":"Advanced Topology and Set Theory","score":0.9416999816894531,"subfield":{"id":"https://openalex.org/subfields/2608","display_name":"Geometry and Topology"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/extension","display_name":"Extension (predicate logic)","score":0.7759757041931152},{"id":"https://openalex.org/keywords/citation","display_name":"Citation","score":0.5505344271659851},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5247693061828613},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.4668263792991638},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.3588966429233551},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.35555875301361084},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.3419375717639923},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.3250655233860016},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.18664267659187317},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.0628962516784668}],"concepts":[{"id":"https://openalex.org/C2778029271","wikidata":"https://www.wikidata.org/wiki/Q5421931","display_name":"Extension (predicate logic)","level":2,"score":0.7759757041931152},{"id":"https://openalex.org/C2778805511","wikidata":"https://www.wikidata.org/wiki/Q1713","display_name":"Citation","level":2,"score":0.5505344271659851},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5247693061828613},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4668263792991638},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.3588966429233551},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.35555875301361084},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3419375717639923},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.3250655233860016},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.18664267659187317},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0628962516784668}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1002/malq.19780243108","is_oa":false,"landing_page_url":"https://doi.org/10.1002/malq.19780243108","pdf_url":null,"source":{"id":"https://openalex.org/S172351290","display_name":"Mathematical logic quarterly","issn_l":"0044-3050","issn":["0044-3050","0942-5616","1521-3870"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Mathematical Logic Quarterly","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":33,"referenced_works":["https://openalex.org/W79421882","https://openalex.org/W180967188","https://openalex.org/W561395332","https://openalex.org/W562686708","https://openalex.org/W594182318","https://openalex.org/W643678604","https://openalex.org/W773972753","https://openalex.org/W1177244845","https://openalex.org/W1457329112","https://openalex.org/W1580648567","https://openalex.org/W1659717085","https://openalex.org/W1968900240","https://openalex.org/W1981510179","https://openalex.org/W1982086335","https://openalex.org/W1997515224","https://openalex.org/W2005081599","https://openalex.org/W2019113860","https://openalex.org/W2043943452","https://openalex.org/W2048854384","https://openalex.org/W2090086476","https://openalex.org/W2093726609","https://openalex.org/W2120713972","https://openalex.org/W2162910267","https://openalex.org/W2164022697","https://openalex.org/W2575216851","https://openalex.org/W2599759594","https://openalex.org/W3147317048","https://openalex.org/W4237826470","https://openalex.org/W4239262129","https://openalex.org/W4245796794","https://openalex.org/W6611238678","https://openalex.org/W6615767026","https://openalex.org/W6642518604"],"related_works":["https://openalex.org/W2075768550","https://openalex.org/W3022218857","https://openalex.org/W2369178846","https://openalex.org/W2082716031","https://openalex.org/W2370289839","https://openalex.org/W2933494595","https://openalex.org/W1568049691","https://openalex.org/W1590096425","https://openalex.org/W2581850242","https://openalex.org/W2160325950"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2026-08-21T09:56:20.448147","created_date":"2025-10-10T00:00:00"}
