{"id":"https://openalex.org/W2101523490","doi":"https://doi.org/10.1016/0012-365x(80)90149-1","title":"On a problem of R. Halin concerning infinite graphs II","display_name":"On a problem of R. Halin concerning infinite graphs II","publication_year":1980,"publication_date":"1980-01-01","ids":{"openalex":"https://openalex.org/W2101523490","doi":"https://doi.org/10.1016/0012-365x(80)90149-1","mag":"2101523490"},"language":"en","primary_location":{"id":"doi:10.1016/0012-365x(80)90149-1","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0012-365x(80)90149-1","pdf_url":null,"source":{"id":"https://openalex.org/S18902827","display_name":"Discrete Mathematics","issn_l":"0012-365X","issn":["0012-365X","1872-681X"],"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":"Discrete Mathematics","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/A5014304107","display_name":"Thomas Andreae","orcid":null},"institutions":[{"id":"https://openalex.org/I75951250","display_name":"Freie Universit\u00e4t Berlin","ror":"https://ror.org/046ak2485","country_code":"DE","type":"education","lineage":["https://openalex.org/I75951250"]}],"countries":["DE"],"is_corresponding":true,"raw_author_name":"Thomas Andreae","raw_affiliation_strings":["Freie Universit\u00e4t Berlin, Institut f\u00fcr Mathematik II, 1 Berlin 33, K\u00f6nigin-Luise-Strasse 24/26, Federal Republic of Germany#TAB#"],"affiliations":[{"raw_affiliation_string":"Freie Universit\u00e4t Berlin, Institut f\u00fcr Mathematik II, 1 Berlin 33, K\u00f6nigin-Luise-Strasse 24/26, Federal Republic of Germany#TAB#","institution_ids":["https://openalex.org/I75951250"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5014304107"],"corresponding_institution_ids":["https://openalex.org/I75951250"],"apc_list":{"value":3000,"currency":"USD","value_usd":3000},"apc_paid":null,"fwci":0.5924,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.63859112,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"29","issue":"3","first_page":"219","last_page":"227"},"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":0.998199999332428,"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":0.998199999332428,"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/T10374","display_name":"Advanced Graph Theory Research","score":0.9969000220298767,"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/T11476","display_name":"Graph theory and applications","score":0.9936000108718872,"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/mathematics","display_name":"Mathematics","score":0.9410490989685059},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.7450441718101501},{"id":"https://openalex.org/keywords/treewidth","display_name":"Treewidth","score":0.5538173317909241},{"id":"https://openalex.org/keywords/discrete-mathematics","display_name":"Discrete mathematics","score":0.5397776961326599},{"id":"https://openalex.org/keywords/pathwidth","display_name":"Pathwidth","score":0.2961403727531433},{"id":"https://openalex.org/keywords/graph","display_name":"Graph","score":0.28477779030799866},{"id":"https://openalex.org/keywords/line-graph","display_name":"Line graph","score":0.07719427347183228}],"concepts":[{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.9410490989685059},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.7450441718101501},{"id":"https://openalex.org/C132569581","wikidata":"https://www.wikidata.org/wiki/Q5067368","display_name":"Treewidth","level":5,"score":0.5538173317909241},{"id":"https://openalex.org/C118615104","wikidata":"https://www.wikidata.org/wiki/Q121416","display_name":"Discrete mathematics","level":1,"score":0.5397776961326599},{"id":"https://openalex.org/C43517604","wikidata":"https://www.wikidata.org/wiki/Q7144893","display_name":"Pathwidth","level":4,"score":0.2961403727531433},{"id":"https://openalex.org/C132525143","wikidata":"https://www.wikidata.org/wiki/Q141488","display_name":"Graph","level":2,"score":0.28477779030799866},{"id":"https://openalex.org/C203776342","wikidata":"https://www.wikidata.org/wiki/Q1378376","display_name":"Line graph","level":3,"score":0.07719427347183228}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0012-365x(80)90149-1","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0012-365x(80)90149-1","pdf_url":null,"source":{"id":"https://openalex.org/S18902827","display_name":"Discrete Mathematics","issn_l":"0012-365X","issn":["0012-365X","1872-681X"],"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":"Discrete Mathematics","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":13,"referenced_works":["https://openalex.org/W1969479765","https://openalex.org/W1969829602","https://openalex.org/W1989325605","https://openalex.org/W1989809675","https://openalex.org/W1992481914","https://openalex.org/W2018765574","https://openalex.org/W2031445715","https://openalex.org/W2051434509","https://openalex.org/W2051982950","https://openalex.org/W2055289939","https://openalex.org/W2083941910","https://openalex.org/W2163841074","https://openalex.org/W4213239903"],"related_works":["https://openalex.org/W4321393130","https://openalex.org/W2736575577","https://openalex.org/W2178269805","https://openalex.org/W1579590954","https://openalex.org/W2223243427","https://openalex.org/W4306887989","https://openalex.org/W2951811902","https://openalex.org/W186753374","https://openalex.org/W2949940357","https://openalex.org/W4302375582"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}