{"id":"https://openalex.org/W1980692262","doi":"https://doi.org/10.1016/0168-0072(87)90084-4","title":"Some higher-gap examples in combinatorial set theory","display_name":"Some higher-gap examples in combinatorial set theory","publication_year":1987,"publication_date":"1987-01-01","ids":{"openalex":"https://openalex.org/W1980692262","doi":"https://doi.org/10.1016/0168-0072(87)90084-4","mag":"1980692262"},"language":"en","primary_location":{"id":"doi:10.1016/0168-0072(87)90084-4","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0168-0072(87)90084-4","pdf_url":null,"source":{"id":"https://openalex.org/S172477885","display_name":"Annals of Pure and Applied Logic","issn_l":"0168-0072","issn":["0168-0072","1873-2461"],"is_oa":false,"is_in_doaj":false,"is_core":true,"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":"Annals of Pure and Applied Logic","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/A5066167166","display_name":"A. Hajnal","orcid":"https://orcid.org/0000-0001-7297-7134"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"A. Hajnal","raw_affiliation_strings":["Inst. Math. of Hung. Acad. Sci., Budapest, Re\u00e1ltanoda u.13-15, 1053 Hungary"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Inst. Math. of Hung. Acad. Sci., Budapest, Re\u00e1ltanoda u.13-15, 1053 Hungary","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5044179959","display_name":"P\u00e9ter Komj\u00e1th","orcid":"https://orcid.org/0000-0002-2806-6103"},"institutions":[{"id":"https://openalex.org/I106118109","display_name":"E\u00f6tv\u00f6s Lor\u00e1nd University","ror":"https://ror.org/01jsq2704","country_code":"HU","type":"education","lineage":["https://openalex.org/I106118109"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"P. Komj\u00e1th","raw_affiliation_strings":["Inst. Math. of the E\u00f6tv\u00f6s University, Department of Algebra & Number Theory, Budapest, M\u00fazeum krt. 6-8, 1088 Hungary"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Inst. Math. of the E\u00f6tv\u00f6s University, Department of Algebra & Number Theory, Budapest, M\u00fazeum krt. 6-8, 1088 Hungary","institution_ids":["https://openalex.org/I106118109"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3390,"currency":"USD","value_usd":3390},"apc_paid":null,"fwci":1.4118,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.73427471,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"33","issue":null,"first_page":"283","last_page":"296"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11329","display_name":"Limits and Structures in Graph Theory","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11329","display_name":"Limits and Structures in Graph Theory","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2607","display_name":"Discrete Mathematics and Combinatorics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11151","display_name":"Advanced Topology and Set Theory","score":0.9991000294685364,"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"}},{"id":"https://openalex.org/T10374","display_name":"Advanced Graph Theory Research","score":0.9879999756813049,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.6768074631690979},{"id":"https://openalex.org/keywords/set-theory","display_name":"Set theory","score":0.6115407943725586},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5665839314460754},{"id":"https://openalex.org/keywords/universal-set","display_name":"Universal set","score":0.5462751388549805},{"id":"https://openalex.org/keywords/combinatorial-principles","display_name":"Combinatorial principles","score":0.5182154774665833},{"id":"https://openalex.org/keywords/algebra-over-a-field","display_name":"Algebra over a field","score":0.41223275661468506},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.4103138744831085},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.32551345229148865},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.27055683732032776},{"id":"https://openalex.org/keywords/pure-mathematics","display_name":"Pure mathematics","score":0.2585456967353821},{"id":"https://openalex.org/keywords/combinatorial-explosion","display_name":"Combinatorial explosion","score":0.132038414478302},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.07067498564720154}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6768074631690979},{"id":"https://openalex.org/C153046414","wikidata":"https://www.wikidata.org/wiki/Q12482","display_name":"Set theory","level":3,"score":0.6115407943725586},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5665839314460754},{"id":"https://openalex.org/C102565666","wikidata":"https://www.wikidata.org/wiki/Q1378301","display_name":"Universal set","level":3,"score":0.5462751388549805},{"id":"https://openalex.org/C1769372","wikidata":"https://www.wikidata.org/wiki/Q3850844","display_name":"Combinatorial principles","level":3,"score":0.5182154774665833},{"id":"https://openalex.org/C136119220","wikidata":"https://www.wikidata.org/wiki/Q1000660","display_name":"Algebra over a field","level":2,"score":0.41223275661468506},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.4103138744831085},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.32551345229148865},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.27055683732032776},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.2585456967353821},{"id":"https://openalex.org/C115908005","wikidata":"https://www.wikidata.org/wiki/Q2668364","display_name":"Combinatorial explosion","level":2,"score":0.132038414478302},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.07067498564720154}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0168-0072(87)90084-4","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0168-0072(87)90084-4","pdf_url":null,"source":{"id":"https://openalex.org/S172477885","display_name":"Annals of Pure and Applied Logic","issn_l":"0168-0072","issn":["0168-0072","1873-2461"],"is_oa":false,"is_in_doaj":false,"is_core":true,"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":"Annals of Pure and Applied Logic","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":13,"referenced_works":["https://openalex.org/W170265681","https://openalex.org/W598417694","https://openalex.org/W1415105629","https://openalex.org/W1983739950","https://openalex.org/W1983822779","https://openalex.org/W2004543182","https://openalex.org/W2014922166","https://openalex.org/W2016098089","https://openalex.org/W2087518766","https://openalex.org/W2912586108","https://openalex.org/W4233900282","https://openalex.org/W4248327046","https://openalex.org/W6628198191"],"related_works":["https://openalex.org/W2098788035","https://openalex.org/W4388295869","https://openalex.org/W4293165874","https://openalex.org/W2067638726","https://openalex.org/W4299648766","https://openalex.org/W4360891774","https://openalex.org/W2957475467","https://openalex.org/W2070993195","https://openalex.org/W4229841181","https://openalex.org/W1980692262"],"abstract_inverted_index":null,"counts_by_year":[{"year":2013,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}